Pyyan / Compare / o3 / o4-mini vs Claude Sonnet 5
o3 / o4-mini vs Claude Sonnet 5
2 of 5Language Models · verified 13 Aug 2026
o3 / o4-miniOpenAIretiredClaude Sonnet 5Anthropiccurrent
| Specification | o3 / o4-mini | Claude Sonnet 5 |
|---|---|---|
| Summary | The o-series reasoning line, retired Feb 2026. | Near-Opus quality on coding and agentic work at Sonnet cost. |
| Context | — | 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.
o3 / o4-mini
- Reasoning is now an effort setting on GPT-5.x, not a separate model
Best for nothing — migrate.
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.