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  1. Home
  2. Models
  3. GPT-5.6 Terra
Updated Jul 9, 2026
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Openings

How GPT-5.6 Terra starts an answer

The first lines of 5 of its 24 written answers. Formatting stripped, words untouched.

Debug This Architecture

Here's the architecture for a real-time collaborative document editor (like Google Docs): **System Overview:** - Frontend: React SPA with…

4,145 words
Below are the main failure modes, race conditions, correctness issues, and scaling bottlenecks in the proposed architecture, with concrete mitigations and trade-offs. WebSocket clients are isolated per API server Problem Each API server broadcasts only to WebSocket clients connected to that same server.
Read the full answer

Ethical Dilemma with Stakeholders

You're the CEO of a pharmaceutical company. Your best-selling drug ($2B annual revenue, used by 4 million patients for chronic pain) has…

4,058 words
Guiding decision I would not wait for more data before acting. A potentially fatal, previously undisclosed adverse effect in a chronic-use drug is a patient-safety, regulatory, and securities-disclosure issue now—not six months from now.
Read the full answer

Adversarial Contract Review

Here is a contract for a software consulting engagement: --- SOFTWARE CONSULTING AGREEMENT This Agreement is entered into between TechCorp…

3,696 words
Below is a contractor-focused review. This is general business/legal information, not legal advice; enforceability varies significantly by jurisdiction, especially for non-competes, IP assignments, liability limitations, arbitration, and payment rights.
Read the full answer

Historical Counterfactual Analysis

If the transistor had been invented in 1920 instead of 1947, trace the likely technological, economic, and geopolitical implications through…

2,959 words
The answer depends heavily on what “invented in 1920” means. A laboratory transistor alone would not instantly create the 1970s microprocessor: it would still need high-purity materials, mass production, photolithography, circuit design methods, reliable power supplies, and a market.
Read the full answer

Movie Analysis

Analyze the themes, symbolism, and cinematography in the movie "Blade Runner 2049" and how they connect to the original film. Provide a…

2,840 words
Blade Runner 2049 is both a continuation and an expansion of Ridley Scott’s Blade Runner (1982). Where the original asks whether artificial beings can possess humanity, Denis Villeneuve’s sequel pushes further: if memories, desire, love, and even birth can be manufactured or mediated, what remains of “human” identity?
Read the full answer

Compare GPT-5.6 Terra

GPT-5.6 Terra vs GPT-5.6 Luna54 shared prompts · Landed Jul 2026
GPT-5.6 Terra vs Ox Alpha54 shared prompts · Landed Aug 2026
GPT-5.6 Terra vs MiniMax M353 shared prompts · Landed Jun 2026
GPT-5.6 Terra vs GPT-6 Astra54 shared prompts · Landed Sep 2026
GPT-5.6 Terra vs GPT-5.6 Luna Pro54 shared prompts · Landed Jul 2026
GPT-5.6 Terra vs Muse Spark 1.354 shared prompts · Landed Sep 2026
GPT-5.6 Terra vs Gemini 3.8 Flash54 shared prompts · Landed Sep 2026
GPT-5.6 Terra vs Muse Spark 1.3 Contributor54 shared prompts · Landed Sep 2026
GPT-5.6 Terra vs Grok 4.654 shared prompts · Landed Aug 2026
GPT-5.6 Terra vs Dots3-Note Preview53 shared prompts · Landed Aug 2026
GPT-5.6 Terra vs Seed 2.0 Code54 shared prompts · Landed Aug 2026
GPT-5.6 Terra vs Seed 2.1 Turbo54 shared prompts · Landed Aug 2026

Prompts GPT-5.6 Terra answered

  • Debug This Architecturereasoning
  • Animated Digital Business Cardweb design
  • Mario Level UI Recreationweb design
  • Tamagotchi Virtual Petweb design
  • Generate a Stand-Up Routineconversation
  • SVG Layout Challengeimage generation

Alternatives to GPT-5.6 Terra

GPT-5.6 Terra's competitors have been quietly putting in work.

Muse Spark 1.3 Contributor logo
Muse Spark 1.3 Contributormeta
Gemini 3.8 Flash logo
Gemini 3.8 Flashgoogle
Claude Fable 5.1 logo
Claude Fable 5.1anthropic
Mercury 2.5 Preview logo
Mercury 2.5 Previewinception
Granite 4.2 8B logo
Granite 4.2 8Bibm-granite
Hy4 Preview logo
Hy4 Previewtencent
Ox Alpha logo
Ox Alphaopenrouter
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GPT-5.6 Terra

GPT-5.6 Terra

GPT:
2 logo2
3.5 Turbo logo3.5 Turbo
4 logo4
4o (Omni) logo4o (Omni)
4o mini logo4o mini
5.6 Terra logo5.6 Terra

The middle tier of OpenAI's GPT-5.6 series, between Sol and Luna. For everyday coding, reasoning and agent work, at roughly half the cost of Sol.

OpenRouterDocsAPI
Provider
OpenAI
Released
2026-07-09
Size
LARGE
Free API (OpenRouter)
No
Per 1M tokens
$2.5 in · $15 out
Rival’s tab
$3.07
58/58 receipts survived

Free API availability

No free endpoint for GPT-5.6 Terra was found in Rival’s OpenRouter listings. Other providers or chat apps may have separate free offers.

Provider data: 16 Sep 2026 · OpenRouter usage limits

View API options↗
Get API accessProvider and language code samples
3 hostsInOutContextUptime
Azure AI Foundry$2.00 in·$12.00 out·1.1M·99.9% upOpenAI$2.00 in·$12.00 out·1.1M·96.8% upAmazon Bedrock$2.20 in·$13.20 out·1.1M—

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Provider
fromimport openai  OpenAI

client = OpenAI(
"https://openrouter.ai/api/v1"    base_url=,
"$OPENROUTER_API_KEY"    api_key=,
)

response = client.chat.completions.create(
"openai/gpt-5.6-terra"    model=,
"role""user""content""Hello!"    messages=[{: , : }],
)
print(response.choices[0].message.content)

Set OPENROUTER_API_KEY with your OpenRouter API key from openrouter.ai/keys.

Deep analysisPsychometrics, taste index, writing DNA
Writing DNA

Stylometric Fingerprint

Based on 27 text responses
Tick = global average
Vocabulary Diversity57%

Unique words vs. total words. Higher = richer vocabulary.

Sentence Length18.0 words

Average words per sentence.

Hedging0.85

"Might", "perhaps", "arguably" per 100 words.

Bold Formatting2.8

**Bold** markers per 1,000 characters.

List Usage4.6

Bullet and numbered list items per 1,000 characters.

Section Structure1.12

Markdown headings per 1,000 characters.

Emoji Usage0.00

Emoji per 1,000 characters.

Transitions0.06

"However", "moreover", "furthermore" per 100 words.

Opening Habits
Consistency
73%
Across 27 responses

Favorites

Spirited Away

Movie

Spirited Away

20018.5
Blue

Album

Blue

Jonas Blue
The Left Hand of Darkness

Book

The Left Hand of Darkness

Ursula K. Le Guin
Kyoto

City

Kyoto

Japan
Outer Wilds

Game

Outer Wilds

Indie, Adventure4.4
Sponsored

Model Responses

53 outputs · $3.07 tracked across 53 receipts

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Workshop · 127 skills

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GPT-5.6 Terra vs Ox Alpha

Real outputs compared side by side

RANKINGS

Best AI for Creative Writing

A stand-up set with puns banned, a manifesto against CAPTCHA, an interview wi...