Model Comparison

Claude 3.5 Haiku vs DeepSeek-V4-Flash-0731Which is better in 2026?

Comparing Claude 3.5 Haiku and DeepSeek-V4-Flash-0731 across benchmarks, pricing, and capabilities.

Verdict: Claude 3.5 Haiku vs DeepSeek-V4-Flash-0731 — which is better?

Claude 3.5 Haiku (by Anthropic) and DeepSeek-V4-Flash-0731 (by DeepSeek) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

On price, DeepSeek-V4-Flash-0731 is roughly 14.2x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

DeepSeek-V4-Flash-0731 also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Choose Claude 3.5 Haiku if…

  • you want predictable pricing at $0.80/M input and $4.00/M output

Choose DeepSeek-V4-Flash-0731 if…

  • cost matters — it's about 14.2x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Jul 2026
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Claude 3.5 Haiku and DeepSeek-V4-Flash-0731don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

DeepSeek-V4-Flash-0731 costs less

For input processing, Claude 3.5 Haiku ($0.80/1M tokens) is 8.9x more expensive than DeepSeek-V4-Flash-0731 ($0.09/1M tokens).

For output processing, Claude 3.5 Haiku ($4.00/1M tokens) is 22.2x more expensive than DeepSeek-V4-Flash-0731 ($0.18/1M tokens).

In conclusion, Claude 3.5 Haiku is more expensive than DeepSeek-V4-Flash-0731.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Tue Aug 04 2026 • llm-stats.com
Anthropic
Claude 3.5 Haiku
Input tokens$0.80
Output tokens$4.00
Best providerAWS Bedrock
DeepSeek
DeepSeek-V4-Flash-0731
Input tokens$0.09
Output tokens$0.18
Best providerDeepinfra
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

DeepSeek-V4-Flash-0731 accepts 1,048,576 input tokens compared to Claude 3.5 Haiku's 200,000 tokens. Claude 3.5 Haiku can generate longer responses up to 200,000 tokens, while DeepSeek-V4-Flash-0731 is limited to 65,536 tokens.

Anthropic
Claude 3.5 Haiku
Input200,000 tokens
Output200,000 tokens
DeepSeek
DeepSeek-V4-Flash-0731
Input1,048,576 tokens
Output65,536 tokens
Tue Aug 04 2026 • llm-stats.com

License

Usage and distribution terms

Claude 3.5 Haiku is licensed under a proprietary license, while DeepSeek-V4-Flash-0731 uses MIT.

License differences may affect how you can use these models in commercial or open-source projects.

Claude 3.5 Haiku

Proprietary

Closed source

DeepSeek-V4-Flash-0731

MIT

Open weights

Release Timeline

When each model was launched

Claude 3.5 Haiku was released on 2024-10-22, while DeepSeek-V4-Flash-0731 was released on 2026-07-31.

DeepSeek-V4-Flash-0731 is 22 months newer than Claude 3.5 Haiku.

Claude 3.5 Haiku

Oct 22, 2024

1.8 years ago

DeepSeek-V4-Flash-0731

Jul 31, 2026

4 days ago

1.8yr newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Claude 3.5 Haiku is available from Bedrock, Google, Anthropic. DeepSeek-V4-Flash-0731 is available from DeepInfra, Fireworks, Novita.

Claude 3.5 Haiku

bedrock logo
AWS Bedrock
Input Price:Input: $0.80/1MOutput Price:Output: $4.00/1M
google logo
Google
Input Price:Input: $0.80/1MOutput Price:Output: $4.00/1M
anthropic logo
Anthropic
Input Price:Input: $1.00/1MOutput Price:Output: $5.00/1M

DeepSeek-V4-Flash-0731

deepinfra logo
Deepinfra
Input Price:Input: $0.09/1MOutput Price:Output: $0.18/1M
fireworks logo
Fireworks
Input Price:Input: $0.14/1MOutput Price:Output: $0.28/1M
novita logo
Novita
Input Price:Input: $0.14/1MOutput Price:Output: $0.28/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic

No standout differentiators in the data we have for this pair.

DeepSeek
Larger context window (1,048,576 tokens)
Less expensive input tokens
Less expensive output tokens
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Claude 3.5 Haiku and DeepSeek-V4-Flash-0731 side-by-side, then vote on the output you prefer.

Claude 3.5 Haiku
✓ Preferred
DeepSeek-V4-Flash-0731
Open in Playground
AI Model Comparison Table
Feature
Anthropic
Claude 3.5 Haiku
DeepSeek
DeepSeek-V4-Flash-0731

FAQ

Common questions about Claude 3.5 Haiku vs DeepSeek-V4-Flash-0731.

Which is better, Claude 3.5 Haiku or DeepSeek-V4-Flash-0731?

Claude 3.5 Haiku (Anthropic) and DeepSeek-V4-Flash-0731 (DeepSeek) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Claude 3.5 Haiku compare to DeepSeek-V4-Flash-0731 in benchmarks?

Claude 3.5 Haiku scores HumanEval: 88.1%, MGSM: 85.6%, DROP: 83.1%, MATH: 69.4%, MMLU-Pro: 65.0%. DeepSeek-V4-Flash-0731 scores Terminal-Bench 2.1: 82.7%, CyberGym: 76.7%, Toolathlon: 70.3%, DSBench-FullStack: 68.7%, DSBench-Hard: 59.6%.

Is Claude 3.5 Haiku cheaper than DeepSeek-V4-Flash-0731?

DeepSeek-V4-Flash-0731 is 8.9x cheaper for input tokens. Claude 3.5 Haiku costs $0.80/M input and $4.00/M output via bedrock. DeepSeek-V4-Flash-0731 costs $0.09/M input and $0.18/M output via deepinfra.

What are the context window sizes for Claude 3.5 Haiku and DeepSeek-V4-Flash-0731?

Claude 3.5 Haiku supports 200K tokens and DeepSeek-V4-Flash-0731 supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude 3.5 Haiku and DeepSeek-V4-Flash-0731?

Key differences include context window (200K vs 1.0M), input pricing ($0.80 vs $0.09/M), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude 3.5 Haiku and DeepSeek-V4-Flash-0731?

Claude 3.5 Haiku is developed by Anthropic and DeepSeek-V4-Flash-0731 is developed by DeepSeek.

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