GPT-5.1-Codex-Max vs Qwen3.8 Omni Flash
Price, context window & benchmark comparison
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Verdict: Qwen3.8 Omni Flash is 14.9× cheaper than GPT-5.1-Codex-Max on a typical 3:1 input/output mix. Qwen3.8 Omni Flash has the larger context window (1M vs 400K).
| GPT-5.1-Codex-Max | Qwen3.8 Omni Flash | |
|---|---|---|
| Input price / 1M | $1.25 | $0.15 |
| Output price / 1M | $10.00 | $0.47 |
| Blended price (3:1) | $3.44 | $0.23 |
| Cached input / 1M | $0.13 | $0.016 |
| Context window | 400K | 1M |
| Max output | 128K | 131K |
| Intelligence index | — | — |
| Coding index | — | — |
| Providers | — | 1 |
| Best provider uptime (30m) | — | 100.0% |
| Vision input | Yes | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2025-12-04 | 2026-09-21 |
| Retirement | — | — |
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FAQ
Which is cheaper, GPT-5.1-Codex-Max or Qwen3.8 Omni Flash?
Qwen3.8 Omni Flash is 14.9× cheaper than GPT-5.1-Codex-Max on a typical 3:1 input/output mix.
GPT-5.1-Codex-Max vs Qwen3.8 Omni Flash: which has a bigger context window?
GPT-5.1-Codex-Max: 400,000 tokens. Qwen3.8 Omni Flash: 1,000,000 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: GPT-5.1-Codex-Max ≈ $7,500, Qwen3.8 Omni Flash ≈ $535.00.
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