token.app › Compare › GPT-5.1-Codex-Max vs Claude Sonnet 5
GPT-5.1-Codex-Max vs Claude Sonnet 5
GPT-5.1-Codex-Max is 1.2× cheaper per token on a blended 3:1 basis. Claude Sonnet 5 accepts the larger context window (1M).
Head to head
Blended price uses a 3:1 input:output mix
| GPT-5.1-Codex-Max | Claude Sonnet 5 | |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Input $/1M | $1.25 | $2.00 |
| Output $/1M | $10.00 | $10.00 |
| Blended $/1M | $3.44 | $4.00 |
| Context window | 400K | 1M |
| Max output | 128K | 128K |
| Released | Dec 2025 | Jun 2026 |
| Licence | Proprietary | Proprietary |
Choose GPT-5.1-Codex-Max if…
- Costs less per token — $3.44 vs $4.00 blended
Choose Claude Sonnet 5 if…
- Larger context window (1M)
- Newer model (released Jun 2026)
FAQ
Which is better, GPT-5.1-Codex-Max or Claude Sonnet 5?
We do not hold independently-run benchmark scores covering both GPT-5.1-Codex-Max and Claude Sonnet 5, so we make no quality claim. Their pricing and specifications are compared on this page.
Is GPT-5.1-Codex-Max cheaper than Claude Sonnet 5?
GPT-5.1-Codex-Max is cheaper: $3.44 versus $4.00 per million tokens blended at 3:1 input:output. Input alone: $1.25 vs $2.00. Output alone: $10.00 vs $10.00.
What context windows do GPT-5.1-Codex-Max and Claude Sonnet 5 have?
GPT-5.1-Codex-Max: 400,000 tokens. Claude Sonnet 5: 1,000,000 tokens.
Who makes GPT-5.1-Codex-Max and Claude Sonnet 5?
GPT-5.1-Codex-Max is made by OpenAI. Claude Sonnet 5 is made by Anthropic.
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