Pyyan / Compare / GPT-5.5 vs Claude Sonnet 5
GPT-5.5 vs Claude Sonnet 5
2 of 5Language Models · verified 13 Aug 2026
GPT-5.5OpenAIcurrentClaude Sonnet 5Anthropiccurrent
| Specification | GPT-5.5 | Claude Sonnet 5 |
|---|---|---|
| Summary | Previous flagship, launched April 2026. | Near-Opus quality on coding and agentic work at Sonnet cost. |
| Context | — | 1M |
| Input ($/Mtok) | $5 | $3 |
| Output ($/Mtok) | $30 | $15 |
| Licence | Proprietary | Proprietary |
| Max output | — | 128K |
| Released | 24 Apr 2026 | — |
| 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.