Composer 2.5 vs GPT-5.6 Luna
Specs, per-token pricing, and live benchmark scores — refreshed daily from our benchmark database.
Specs & pricing
| Composer 2.5 | GPT-5.6 Luna | |
|---|---|---|
| Company | Anysphere | OpenAI |
| Released | Jul 2026 | Jul 2026 |
| Context window | — | 1.0M |
| Input /1M tokens | $0.5 | $1 |
| Output /1M tokens | $2.5 | $6 |
| Open weights | No | No |
Benchmarks
| Benchmark | Composer 2.5 | GPT-5.6 Luna |
|---|---|---|
| GPQA | — | 91.1% |
| Hallucination Rate (lower is better) | — | 87.7% |
| SWE-bench Verified | — | 93.0% |
| Speed (tok/s) | — | 171 tok/s |
Scores come from published leaderboards and official model cards (sources listed on the benchmarks page) and refresh daily. Pricing via vendor pages and OpenRouter.