Pyyan / Compare / GPT-5.6 Luna vs Claude Sonnet 5
GPT-5.6 Luna vs Claude Sonnet 5
2 of 5Language Models · verified 13 Aug 2026
GPT-5.6 LunaOpenAIcurrentClaude Sonnet 5Anthropiccurrent
| Specification | GPT-5.6 Luna | Claude Sonnet 5 |
|---|---|---|
| Summary | Fastest and cheapest GPT-5.6 tier. | Near-Opus quality on coding and agentic work at Sonnet cost. |
| Context | 1M+ | 1M |
| Input ($/Mtok) | — | $3 |
| Output ($/Mtok) | — | $15 |
| Licence | Proprietary | Proprietary |
| Max output | — | 128K |
| Model ID | — | claude-sonnet-5 |
| Category | Language Models | Language Models |
| Official | OpenAI ↗ | Anthropic ↗ |
Highlighted rows are where these differ.
Claude Sonnet 5
- Adaptive thinking on by default
- New tokenizer — roughly 30% more tokens for the same text
- Introductory $2/$10 through 31 Aug 2026
Best for high-volume production.