token.app › Compare › GPT-5.1-Codex-Max vs Beam 1.0 501B A23B
GPT-5.1-Codex-Max vs Beam 1.0 501B A23B
Beam 1.0 501B A23B is 7.9× cheaper per token on a blended 3:1 basis. Beam 1.0 501B A23B accepts the larger context window (1.0M).
Head to head
Blended price uses a 3:1 input:output mix
| GPT-5.1-Codex-Max | Beam 1.0 501B A23B | |
|---|---|---|
| Provider | OpenAI | Reflection |
| Input $/1M | $1.25 | $0.250 |
| Output $/1M | $10.00 | $1.00 |
| Blended $/1M | $3.44 | $0.438 |
| Context window | 400K | 1.0M |
| Max output | 128K | 131K |
| Released | Dec 2025 | Oct 2026 |
| Licence | Proprietary | Open weights |
Choose GPT-5.1-Codex-Max if…
- No clear advantage on the data we hold.
Choose Beam 1.0 501B A23B if…
- Costs less per token — $0.438 vs $3.44 blended
- Larger context window (1.0M)
- Open weights — self-hostable
- Newer model (released Oct 2026)
FAQ
Which is better, GPT-5.1-Codex-Max or Beam 1.0 501B A23B?
We do not hold independently-run benchmark scores covering both GPT-5.1-Codex-Max and Beam 1.0 501B A23B, so we make no quality claim. Their pricing and specifications are compared on this page.
Is GPT-5.1-Codex-Max cheaper than Beam 1.0 501B A23B?
Beam 1.0 501B A23B is cheaper: $0.438 versus $3.44 per million tokens blended at 3:1 input:output. Input alone: $1.25 vs $0.250. Output alone: $10.00 vs $1.00.
What context windows do GPT-5.1-Codex-Max and Beam 1.0 501B A23B have?
GPT-5.1-Codex-Max: 400,000 tokens. Beam 1.0 501B A23B: 1,048,576 tokens.
Who makes GPT-5.1-Codex-Max and Beam 1.0 501B A23B?
GPT-5.1-Codex-Max is made by OpenAI. Beam 1.0 501B A23B is made by Reflection.
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