What is the difference between Claude Haiku 4.5 and DeepSeek V4.1 Flash?

Claude Haiku 4.5 is developed by Anthropic while DeepSeek V4.1 Flash is developed by DeepSeek. Claude Haiku 4.5 has a 200K token context window vs DeepSeek V4.1 Flash's 1.0M. You can compare their actual outputs across 6 challenges on Rival to see how they differ in practice.

Which is better, Claude Haiku 4.5 or DeepSeek V4.1 Flash?

It depends on your use case. Claude Haiku 4.5 and DeepSeek V4.1 Flash each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 6 challenges so you can judge which fits your needs best.

How much does Claude Haiku 4.5 cost compared to DeepSeek V4.1 Flash?

Claude Haiku 4.5 costs $1/M input tokens and DeepSeek V4.1 Flash costs $0.15/M input tokens. DeepSeek V4.1 Flash is $0.85/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Claude Haiku 4.5 and DeepSeek V4.1 Flash on Rival?

This page shows a side-by-side comparison of Claude Haiku 4.5 and DeepSeek V4.1 Flash across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

Updated Sep 2026

Claude Haiku 4.5vsDeepSeek V4.1 Flash

DeepSeek V4.1 Flash is cheaper than Claude Haiku 4.5 at $0.15/M vs $1/M input tokens.

Claude Haiku 4.5 and DeepSeek V4.1 Flash compared across 6 shared prompts
Spec	Claude Haiku 4.5	DeepSeek V4.1 Flash
Input price	$1/M tokens	$0.15/M tokens
Output price	$5/M tokens	$0.6/M tokens
Context window	200K tokens	1.0M tokens
Weights	Closed	Open
Free API (OpenRouter)	No	No
Released	Oct 2025	Sep 2026

Our Verdict

DeepSeek V4.1 Flash

Claude Haiku 4.5Runner-up

Not enough votes to call it. On the specs, DeepSeek V4.1 Flash has the edge: newer, bigger context window.

DeepSeek V4.1 Flash costs 8.3x less per token.

Too close to call

API pricing

Cost per 1M tokens

Claude Haiku 4.5

Input

$1.00

Output

$5.00

DeepSeek V4.1 Flash

Input

$0.15

6.7× cheaper

Output

$0.60

8.3× cheaper

DeepSeek V4.1 Flash is cheaper on both: 6.7× input, 8.3× output.

Where to run it

27 hosts, cheapest first

Claude Haiku 4.54 hosts

HostInOutContextUptime

Amazon Bedrock$1.00 in$5.00 out200k100% up Anthropic$1.00 in$5.00 out200k100% up Azure AI Foundry$1.00 in$5.00 out200k100% up Google Vertex AI$1.00 in$5.00 out200k99.9% up

DeepSeek V4.1 Flash23 hosts

HostInOutContextUptime

Morph$0.12 in$0.48 out1M98.4% up Relacefp4$0.13 in$0.52 out1M99.9% up Sail Researchfp4$0.13 in$0.75 out1M99.9% up DeepInfrafp8$0.14 in$0.42 out1M99.7% up Alibaba Cloud$0.15 in$0.60 out1M99.9% up DeepSeek$0.15 in$0.60 out1M100% up

17 more hosts

StreamLakefp8$0.15 in$0.60 out1M99.5% up Wafer$0.20 in$0.60 out1M99.8% up CoreWeavefp8$0.20 in$0.65 out1M99.1% up OpenInferencefp4$0.20 in$0.80 out1M99.4% up Fireworks$0.22 in$0.66 out1M98.4% up Phala$0.28 in$1.10 out1M99.4% up GMI Cloudfp8$0.28 in$1.14 out1M99.7% up Novitafp8$0.28 in$1.14 out1M100% up AtlasCloudfp8$0.30 in$1.20 out1M99.8% up Basetenfp8$0.30 in$1.20 out1M98.2% up Makora$0.30 in$1.20 out1M98.7% up Modal$0.30 in$1.20 out1M99.8% up Parasailfp8$0.30 in$1.20 out1M93% up SiliconFlowfp8$0.30 in$1.20 out1M99.8% up Together$0.30 in$1.20 out1M100% up Venicefp8$0.38 in$1.50 out1M94.5% up DigitalOceandegraded$0.30 in$1.20 out1M98.1% up

Per million tokens. Prices and uptime via OpenRouter, checked 22 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Cost per 1M tokens

27 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between Claude Haiku 4.5 and DeepSeek V4.1 Flash?

Which is better, Claude Haiku 4.5 or DeepSeek V4.1 Flash?

How much does Claude Haiku 4.5 cost compared to DeepSeek V4.1 Flash?

How can I compare Claude Haiku 4.5 and DeepSeek V4.1 Flash on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Cost per 1M tokens

27 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between Claude Haiku 4.5 and DeepSeek V4.1 Flash?

Which is better, Claude Haiku 4.5 or DeepSeek V4.1 Flash?

How much does Claude Haiku 4.5 cost compared to DeepSeek V4.1 Flash?

How can I compare Claude Haiku 4.5 and DeepSeek V4.1 Flash on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages