AnthropicClaude Haiku 4.5VSOpenAIGPT-5 mini
Our Take
We recommend GPT-5 mini for superior overall value and reasoning capabilities, as it is cheaper or equal in cost while delivering peak intelligence. While GPT-5 mini excels at complex complex codebases, multi-file repositories, and architectural planning, Claude Haiku 4.5 is suited for scripting multi-file code and clearly defined tasks. Choose GPT-5 mini for architectural codebase planning, or Claude Haiku 4.5 if you specifically require its simpler functions profile.
▶WHY?
Benchmark Calculations & Evidence:
Coding Evaluation: Claude Haiku 4.5 was evaluated on SWE-bench Verified (scoring 73.3%), while GPT-5 mini was evaluated on SWE-bench Pro (scoring 45.7%).
Reasoning Accuracy: Both models were evaluated on the GPQA Diamond benchmark. GPT-5 mini scored 81.6%, while Claude Haiku 4.5 scored 73%.
Cost Efficiency: Claude Haiku 4.5 pricing ($1/M input, $5/M output) is 0.3x cheaper than GPT-5 mini ($0.25/M input, $2/M output).
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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)
$2.00Input: $1.00 | Output: $5.00Context Window
200k tokensBenchmarks & Scores
Coding (swe-bench-pro)
45.7%complex codebases, multi-file repositories, and architectural planning
Reasoning (gpqa-diamond)Winner (+8.6%)
81.6%graduate-level science QA
Cost & Context
Cost (per 1M tokens)2.9x cheaper
$0.69Input: $0.25 | Output: $2.00Context WindowLarger
400k tokensFrequently Asked Questions about Claude Haiku 4.5 vs GPT-5 mini
GPT-5 mini is cheaper than Claude Haiku 4.5. GPT-5 mini has a blended cost of $0.69/1M tokens, which is about 2.9x cheaper than Claude Haiku 4.5 at $2.00/1M tokens.
For coding tasks, Claude Haiku 4.5 scores 73.3% on swe-bench-verified (multi-file code and clearly defined tasks), while GPT-5 mini scores 45.7% on swe-bench-pro (complex codebases, multi-file repositories, and architectural planning).
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