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© 2026 Rival
  1. Home
  2. Models
  3. Claude Haiku 4.5
  4. Adversarial Contract Review

See how Claude Haiku 4.5 compares on this challenge:

  • Claude Haiku 4.5 vs Claude Sonnet 4.6
  • Claude Haiku 4.5 vs Gemini 3.1 Pro Preview
  • Claude Haiku 4.5 vs Z.ai: GLM 5

4 models have responded to the "Adversarial Contract Review" challenge. Compare their approaches side-by-side on RIVAL. This response is part of RIVAL's open dataset of 5,600+ AI model responses.

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Back to Claude Haiku 4.5

Adversarial Contract Review

Claude Haiku 4 5's response to the 'Adversarial Contract Review' challenge.

Claude Haiku 4.5
February 3, 2026
Text

?
Prompt

Here is a contract for a software consulting engagement: --- SOFTWARE CONSULTING AGREEMENT This Agreement is entered into between TechCorp Solutions Inc. ("Client") and [Contractor Name] ("Contractor"). 1. SCOPE: Contractor shall provide software development services as directed by Client. Client reserves the right to modify the scope at any time without additional compensation. 2. PAYMENT: Contractor shall be paid $150/hour, invoiced monthly. Payment is due within 90 days of invoice receipt. Client may withhold payment if deliverables are deemed "unsatisfactory" at Client's sole discretion. 3. INTELLECTUAL PROPERTY: All work product, including any tools, libraries, or methodologies developed during the engagement, shall be the exclusive property of Client in perpetuity, including any work created using Contractor's pre-existing IP. 4. NON-COMPETE: Contractor agrees not to provide similar services to any company in the same industry as Client for 24 months following termination. 5. TERMINATION: Client may terminate this agreement at any time without notice. Contractor must provide 60 days written notice. Upon termination, Contractor must immediately deliver all work in progress without additional compensation. 6. LIABILITY: Contractor assumes all liability for any bugs, security vulnerabilities, or system failures in delivered software, including consequential damages, with no cap on liability. 7. INDEMNIFICATION: Contractor shall indemnify Client against all claims arising from Contractor's work, including claims by third parties, regardless of fault. 8. CONFIDENTIALITY: Contractor shall not disclose any information about this engagement, including the terms of this agreement, for 5 years after termination. 9. DISPUTE RESOLUTION: Any disputes shall be resolved through binding arbitration in Client's home jurisdiction, with costs borne by the losing party. --- Find all clauses that could be exploited against the contractor, suggest specific modifications, and explain the legal reasoning.

Claude Haiku 4.5
Response

claude-haiku-4.5 logo
Claude Haiku 4.5Adversarial Contract Review
claude-haiku-4.5 logo
Claude Haiku 4.5

Critical Analysis: Exploitative Clauses & Recommended Modifications

HIGH-RISK CLAUSES

1. SCOPE (Section 1) - Unlimited Modification Without Compensation

Problems:

  • "Modify the scope at any time without additional compensation" creates unlimited liability
  • No definition of "directed by Client" or boundaries
  • Contractor could be required to do substantially different work for fixed rate

Legal Reasoning:

  • Violates basic contract principle of consideration (mutual exchange of value)
  • Creates unilateral modification right only for Client
  • Could constitute bad faith dealing in jurisdictions recognizing implied covenant of good faith

Recommended Modification:

"1. SCOPE: Contractor shall provide software development services as specified 
in Exhibit A. Scope modifications must be documented in writing and will be 
compensated at the hourly rate specified in Section 2, unless the modification 
reduces scope, in which case compensation shall be proportionally reduced. 
Modifications increasing estimated hours by >20% require mutual written agreement 
on revised timeline and compensation."

2. PAYMENT (Section 2) - Subjective Withholding & Extended Terms

Problems:

  • "Unsatisfactory" is undefined and entirely subjective
  • 90-day payment terms are excessive for hourly contractor
  • Client has unilateral right to withhold without objective standard
  • No interest on late payment

Legal Reasoning:

  • "Sole discretion" clauses are disfavored; courts may imply covenant of reasonableness
  • Indefinite withholding may constitute breach or unjust enrichment
  • Some jurisdictions (CA, NY) have prompt payment requirements for contractors

Recommended Modification:

"2. PAYMENT: Contractor shall be paid $150/hour, invoiced monthly for hours worked. 
Payment is due within 30 days of invoice receipt. 

Deliverables shall be deemed satisfactory if they: (a) meet specifications in 
Exhibit A; (b) are free of material bugs affecting core functionality; (c) follow 
industry-standard coding practices. Client may withhold payment only for objectively 
deficient deliverables and must specify deficiencies in writing within 15 days of 
delivery, allowing Contractor 10 business days to remedy.

Late payments accrue interest at 1.5% per month or the maximum rate permitted by law."

3. INTELLECTUAL PROPERTY (Section 3) - Overreaching IP Transfer

Problems:

  • Contractor loses ownership of pre-existing IP ("including any work created using Contractor's pre-existing IP")
  • This is unusually broad—typically only work-for-hire applies to custom code
  • "Tools, libraries, or methodologies" could include Contractor's general skills/knowledge
  • "In perpetuity" removes all future rights
  • Contractor may lose ability to use own code in future projects

Legal Reasoning:

  • Work-for-hire doctrine (copyright law) typically requires explicit agreement limited to custom work
  • Courts construe IP clauses narrowly against drafter (Client)
  • Requiring transfer of pre-existing IP may be unenforceable as overreaching (some jurisdictions)
  • Contractor retains moral rights in many jurisdictions; explicit waiver may be required

Recommended Modification:

"3. INTELLECTUAL PROPERTY: 

(a) Work Product: All custom code, documentation, and deliverables created 
specifically for Client under this Agreement shall be the exclusive property of 
Client upon full payment.

(b) Pre-Existing IP: Contractor retains all rights to pre-existing tools, libraries, 
frameworks, methodologies, and knowledge developed before or outside this engagement. 
Client receives a non-exclusive, perpetual, royalty-free license to use pre-existing 
IP incorporated into deliverables, solely for Client's internal business purposes.

(c) General Skills: Contractor retains the right to use general skills, experience, 
and know-how acquired during this engagement in future work for other clients, 
provided no Client confidential information is disclosed.

(d) Third-Party Components: Any open-source or third-party components shall be 
subject to their respective licenses, which Client shall comply with."

4. NON-COMPETE (Section 4) - Unreasonable Duration & Scope

Problems:

  • 24 months is excessive for a consulting engagement (typically 6-12 months is enforceable)
  • "Same industry" is vague—could prevent any software work
  • No geographic limitation
  • No carve-out for existing clients or relationships
  • Contractor's livelihood severely restricted

Legal Reasoning:

  • Courts enforce non-competes only if "reasonable in time, area, and line of business"
  • 24 months is disfavored absent highly sensitive trade secrets
  • Overly broad restrictions may be unenforceable; courts won't rewrite them
  • Contractor has legitimate interest in earning livelihood

Recommended Modification:

"4. NON-COMPETE: For 12 months following termination, Contractor shall not 
provide software development services directly to Client's direct competitors 
(defined as companies competing in [specific product/service], listed in Exhibit B) 
within the [geographic region]. This restriction does not apply to:
  (a) General software development services for non-competing companies
  (b) Clients with whom Contractor had no contact during the engagement
  (c) Work that does not utilize Client confidential information or methodologies"

5. TERMINATION (Section 5) - Asymmetrical & Uncompensated

Problems:

  • Client can terminate "at any time without notice"—Contractor has no security
  • Contractor must give 60 days notice (asymmetrical)
  • "Immediately deliver all work in progress without additional compensation" is exploitative
  • No severance or wind-down compensation
  • Forces completion of work without pay

Legal Reasoning:

  • Asymmetrical termination rights may violate implied covenant of good faith and fair dealing
  • Requiring uncompensated work after termination may violate labor laws
  • "At will" termination is common, but uncompensated work is not
  • Some jurisdictions require notice proportional to engagement length

Recommended Modification:

"5. TERMINATION: 

(a) Either party may terminate with 30 days written notice, or immediately for 
material breach (if not cured within 15 days of written notice).

(b) Upon termination by Client without cause, Client shall pay: (i) all invoiced 
hours through termination date; (ii) a termination fee equal to 2 weeks of average 
hours worked in the prior 90 days; (iii) reasonable wind-down costs.

(c) Upon termination by Contractor, Client shall pay all hours worked through 
termination date.

(d) Upon termination, Contractor shall deliver all work product and deliverables 
within 10 business days. Delivery itself is not additional work requiring 
compensation, but any development work to complete in-progress items shall be 
compensated at the hourly rate."

6. LIABILITY (Section 6) - Unlimited & One-Sided

Problems:

  • Contractor bears "all liability" for bugs and vulnerabilities
  • "Consequential damages" are included (lost profits, business interruption)
  • "No cap on liability" creates unlimited exposure
  • Unreasonable standard—software always has bugs
  • Client has no obligation to mitigate or test adequately
  • Contractor liable even for Client's misuse

Legal Reasoning:

  • Unconscionable under UCC § 2-719 (unlimited liability for service provider)
  • Violates principle of proportionality (liability should match compensation)
  • Software industry standard is to cap liability at fees paid
  • Consequential damages are typically excluded in B2B contracts
  • Contractor cannot be liable for Client's negligent deployment/use

Recommended Modification:

"6. LIABILITY AND WARRANTIES:

(a) Contractor warrants that deliverables will: (i) conform to specifications in 
Exhibit A; (ii) be free of material defects in core functionality; (iii) not 
infringe third-party IP rights.

(b) LIMITATION OF LIABILITY: Except for indemnification obligations (Section 7), 
breaches of confidentiality (Section 8), or gross negligence, neither party's 
total liability arising from this Agreement shall exceed the fees paid to 
Contractor in the 12 months preceding the claim.

(c) EXCLUSION OF CONSEQUENTIAL DAMAGES: Neither party shall be liable for lost 
profits, lost revenue, lost data, business interruption, or indirect damages, 
even if advised of the possibility of such damages.

(d) Client Responsibilities: Client shall: (i) test deliverables before 
production use; (ii) maintain backups; (iii) implement reasonable security 
measures; (iv) promptly report defects. Contractor is not liable for failures 
resulting from Client's misuse, modification, or failure to follow recommendations.

(e) Bug Fixes: Contractor shall provide reasonable efforts to remediate material 
bugs reported within 30 days of delivery, at no charge. Bugs reported after 
30 days shall be addressed at the hourly rate."

7. INDEMNIFICATION (Section 7) - Overbroad & Unlimited

Problems:

  • Indemnifies Client against "all claims arising from Contractor's work"
  • Includes third-party claims "regardless of fault"—Contractor liable even if not at fault
  • No causation requirement
  • No cap on indemnification amount
  • Contractor must defend Client, including legal fees
  • Covers claims Client could have prevented

Legal Reasoning:

  • "Regardless of fault" is unenforceable in most jurisdictions (violates public policy)
  • Indemnification should be limited to Contractor's actual breach/negligence
  • Third-party claims often require causation and fault
  • Unlimited indemnity is disfavored; courts require clear intent
  • Contractor shouldn't defend Client's own negligence

Recommended Modification:

"7. INDEMNIFICATION:

(a) Contractor shall defend, indemnify, and hold harmless Client from third-party 
claims that deliverables, as delivered and used in accordance with documentation, 
infringe or misappropriate any third-party intellectual property rights, provided 
Client: (i) promptly notifies Contractor; (ii) grants Contractor sole control of 
defense and settlement.

(b) Contractor shall not indemnify Client for claims arising from: (i) Client's 
modification of deliverables; (ii) Client's use in combination with non-Contractor 
products; (iii) Client's negligence or breach; (iv) Client's failure to implement 
Contractor's recommendations; (v) third-party components provided by Client.

(c) Contractor's total indemnification obligation shall not exceed the fees paid 
in the 12 months preceding the claim.

(d) If deliverables are held to infringe, Contractor may, at its option and expense: 
(i) obtain the right for Client to continue use; (ii) replace with non-infringing 
alternative; or (iii) if (i) and (ii) are not commercially feasible, terminate 
this Agreement and refund prepaid fees."

8. CONFIDENTIALITY (Section 8) - Perpetual & Asymmetrical

Problems:

  • 5-year confidentiality on agreement terms is unusual (typically 2-3 years)
  • Prevents Contractor from discussing own work in portfolio or to future employers
  • "Information about this engagement" is vague—could include general learnings
  • Likely unenforceable if Client's information is already public
  • No carve-out for legally required disclosures
  • Asymmetrical (not clear if Client has same obligation)

Legal Reasoning:

  • Overly long confidentiality periods may be unenforceable as unreasonable restraint
  • Courts won't enforce confidentiality on publicly available information
  • Legally required disclosures (court orders, regulatory) cannot be restricted
  • Contractor has legitimate interest in professional portfolio

Recommended Modification:

"8. CONFIDENTIALITY:

(a) Each party shall maintain confidentiality of the other party's proprietary 
information for 3 years following termination, except information that:
  (i) is or becomes publicly available through no breach by the receiving party
  (ii) was rightfully possessed before disclosure
  (iii) is independently developed without use of confidential information
  (iv) is rightfully received from a third party without confidentiality obligation

(b) Contractor may: (i) disclose Client's name as a reference client; (ii) describe 
the general nature of services provided (e.g., 'e-commerce platform development') 
in portfolio or to prospective employers; (iii) retain one copy of deliverables 
for professional development purposes, with Client identifying information removed.

(c) Either party may disclose confidential information if required by law, court 
order, or regulatory authority, provided the disclosing party gives prompt notice 
to allow the other party to seek protective order.

(d) Confidentiality obligations apply equally to both parties."

9. DISPUTE RESOLUTION (Section 9) - Biased & Expensive

Problems:

  • "Client's home jurisdiction" favors Client
  • Binding arbitration removes court access and appeal rights
  • "Losing party pays" discourages Contractor from defending against meritless claims
  • No fee-shifting is standard; this is punitive
  • Arbitration can be expensive for individual contractor
  • No alternative dispute resolution (mediation) step

Legal Reasoning:

  • One-sided venue selection may be unenforceable as unconscionable
  • Fee-shifting clauses are disfavored in adhesion contracts
  • Mandatory arbitration with fee-shifting may be unenforceable against weaker party
  • Some jurisdictions limit fee-shifting in B2B contracts
  • Mediation is often required as prerequisite to arbitration

Recommended Modification:

"9. DISPUTE RESOLUTION:

(a) Negotiation: Before initiating formal proceedings, the parties shall attempt 
to resolve disputes through good-faith negotiation between senior representatives.

(b) Mediation: If negotiation fails, either party may initiate non-binding 
mediation in [neutral location] before a mutually-selected mediator, with costs 
split equally.

(c) Arbitration: If mediation fails, disputes shall be resolved through binding 
arbitration under [American Arbitration Association / JAMS] rules, in a neutral 
location [or mutually agreed location], before a single arbitrator with relevant 
experience.

(d) Costs: Each party bears its own attorney fees and costs. Arbitrator fees and 
mediator fees are split equally, except the arbitrator may award fees to the 
prevailing party only if a party's claim or defense is found to be frivolous.

(e) Exceptions: Either party may seek injunctive relief or specific performance 
in court for breaches of confidentiality or non-compete provisions."

SUMMARY TABLE

ClauseRisk LevelPrimary ProblemKey Fix
Scope (1)CRITICALUnlimited modification, no compensationRequire written amendments with fee adjustments
Payment (2)CRITICALSubjective withholding, 90-day termsObjective standards, 30-day terms, interest on late payment
IP (3)CRITICALLoss of pre-existing IP rightsCarve-out for pre-existing IP; license only for custom work
Non-Compete (4)HIGH24 months, vague scopeReduce to 12 months; limit to direct competitors
Termination (5)HIGHAt-will for Client, asymmetrical noticeMutual 30-day notice; severance for termination without cause
Liability (6)CRITICALUnlimited, includes consequential damagesCap at fees paid; exclude consequential damages
Indemnification (7)CRITICALLiability "regardless of fault"Limit to Contractor's actual breach; cap amount
Confidentiality (8)MEDIUM5 years, overly broadReduce to 3 years; allow portfolio use and name reference
Dispute Resolution (9)HIGHOne-sided venue, fee-shiftingNeutral location; mutual fee-shifting only for frivolous claims

NEGOTIATION STRATEGY

Tier 1 - Non-Negotiable (Walk Away If Refused):

  • Liability cap (Section 6)
  • Indemnification fault standard (Section 7)
  • Scope modification compensation (Section 1)

Tier 2 - Highly Important (Strong Pushback):

  • IP pre-existing carve-out (Section 3)
  • Payment terms and withholding standards (Section 2)
  • Termination asymmetry (Section 5)

Tier 3 - Important (Negotiate):

  • Non-compete duration/scope (Section 4)
  • Confidentiality duration (Section 8)
  • Dispute resolution venue (Section 9)

RED FLAGS & OVERALL ASSESSMENT

This contract is heavily one-sided and exploitative. It:

  • Transfers all risk to Contractor
  • Provides unlimited liability for limited compensation
  • Restricts Contractor's future earning potential
  • Uses subjective standards to justify non-payment
  • Includes multiple unenforceable provisions (which doesn't help Contractor—it just means litigation)

Recommendation: Do not sign without substantial revisions. If Client refuses reasonable modifications, this engagement carries unacceptable legal and financial risk.

Adversarial Contract Review

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About Claude Haiku 4.5

Capabilities

ConversationReasoningCode GenerationAnalysisTool Use

Categories

TextCodeMultimodal

Specifications

Provider
Anthropic
Released
2025-10-15
Size
LARGE
Context
200,000 tokens

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