Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | GPT-5.6 Terra (medium) | Claude Sonnet 4.6 (Non-reasoning, Low Effort) |
|---|---|---|
| Input ($/M tokens) | $2.5 | $3 |
| Output ($/M tokens) | $15 | $15 |
Data from Artificial Analysis API — 12 benchmarks
GPT-5.6 Terra (medium) is cheaper overall. Its blended price (3:1 input/output ratio) is $5.63/M tokens vs $6.00/M for Claude Sonnet 4.6 (Non-reasoning, Low Effort).
GPT-5.6 Terra (medium) wins 6 out of 12 benchmarks compared to 1 for Claude Sonnet 4.6 (Non-reasoning, Low Effort). See the detailed benchmark chart above for per-category results.
GPT-5.6 Terra (medium) generates tokens faster at 145 tok/s vs 51 tok/s. GPT-5.6 Terra (medium) also has lower time-to-first-token (1.00s vs 1.03s).
Choose based on your priorities: GPT-5.6 Terra (medium) for lower cost, GPT-5.6 Terra (medium) for stronger benchmark performance, and GPT-5.6 Terra (medium) for faster generation. For latency-sensitive apps, check the TTFT comparison above.