Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | GPT-5 (low) | Claude Sonnet 5 (Adaptive Reasoning, Max Effort) |
|---|---|---|
| Input ($/M tokens) | $1.25 | $2 |
| Output ($/M tokens) | $10 | $10 |
Data from Artificial Analysis API — 12 benchmarks
GPT-5 (low) is cheaper overall. Its blended price (3:1 input/output ratio) is $3.44/M tokens vs $4.00/M for Claude Sonnet 5 (Adaptive Reasoning, Max Effort).
GPT-5 (low) wins 7 out of 12 benchmarks compared to 5 for Claude Sonnet 5 (Adaptive Reasoning, Max Effort). See the detailed benchmark chart above for per-category results.
Claude Sonnet 5 (Adaptive Reasoning, Max Effort) generates tokens faster at 87 tok/s vs 78 tok/s. GPT-5 (low) also has lower time-to-first-token (10.01s vs 134.45s).
Choose based on your priorities: GPT-5 (low) for lower cost, GPT-5 (low) for stronger benchmark performance, and Claude Sonnet 5 (Adaptive Reasoning, Max Effort) for faster generation. For latency-sensitive apps, check the TTFT comparison above.