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AnthropicClaude Haiku 4.5VSDeepSeekDeepSeek V4 Pro

Analysis by:the whichllmmodel Editorial Team|Updated: June 2026

Our Take

We recommend DeepSeek V4 Pro for complex complex codebases, multi-file repositories, and architectural planning, or the 1.1x cheaper Claude Haiku 4.5 if your budget requires optimizing costs for very high-volume pipelines. While DeepSeek V4 Pro offers a clear reasoning advantage, it carries a moderate price premium. Choose DeepSeek V4 Pro for architectural codebase planning, or Claude Haiku 4.5 to save on API costs for simple scripts.
▶WHY?
Benchmark Calculations & Evidence:
  • Coding Evaluation: Claude Haiku 4.5 was evaluated on SWE-bench Verified (scoring 73.3%), while DeepSeek V4 Pro was evaluated on SWE-bench Pro (scoring 52.1%).
  • Reasoning Accuracy: Both models were evaluated on the GPQA Diamond benchmark. DeepSeek V4 Pro scored 88%, while Claude Haiku 4.5 scored 73%.
  • Cost Efficiency: Claude Haiku 4.5 pricing ($1/M input, $5/M output) is 1.1x cheaper than DeepSeek V4 Pro ($1.74/M input, $3.48/M output).
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    Model Specs

    Claude Haiku 4.5

    Website

    Benchmarks & Scores

    Coding (swe-bench-verified)
    73.3%

    multi-file code and clearly defined tasks

    Reasoning (gpqa-diamond)
    73%

    graduate-level science QA

    Cost & Context

    Cost (per 1M tokens)1.1x cheaper
    $2.00Input: $1.00 | Output: $5.00
    Context Window
    200k tokens
    Model Specs

    DeepSeek V4 Pro

    Open SourceAPI Available
    Website🤗HF

    Benchmarks & Scores

    Coding (swe-bench-pro)
    52.1%

    complex codebases, multi-file repositories, and architectural planning

    Reasoning (gpqa-diamond)Winner (+15.0%)
    88%

    graduate-level science QA

    Cost & Context

    Cost (per 1M tokens)
    $2.17Input: $1.74 | Output: $3.48
    Context WindowLarger
    1.05M tokens
    Read our data collection methodology

    Frequently Asked Questions about Claude Haiku 4.5 vs DeepSeek V4 Pro

    Claude Haiku 4.5 is cheaper than DeepSeek V4 Pro. Claude Haiku 4.5 has a blended cost of $2.00/1M tokens, which is about 1.1x cheaper than DeepSeek V4 Pro at $2.17/1M tokens.

    For coding tasks, Claude Haiku 4.5 scores 73.3% on swe-bench-verified (multi-file code and clearly defined tasks), while DeepSeek V4 Pro scores 52.1% on swe-bench-pro (complex codebases, multi-file repositories, and architectural planning).

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