token.app › Compare › GPT-5.1-Codex vs Gemini 3.6 Flash
GPT-5.1-Codex vs Gemini 3.6 Flash
Gemini 3.6 Flash is 1.1× cheaper per token on a blended 3:1 basis. Gemini 3.6 Flash accepts the larger context window (1.0M).
Head to head
Blended price uses a 3:1 input:output mix
| GPT-5.1-Codex | Gemini 3.6 Flash | |
|---|---|---|
| Provider | OpenAI | |
| Input $/1M | $1.25 | $1.50 |
| Output $/1M | $10.00 | $7.50 |
| Blended $/1M | $3.44 | $3.00 |
| Context window | 400K | 1.0M |
| Max output | 128K | 66K |
| Released | Nov 2025 | Jul 2026 |
| Licence | Proprietary | Proprietary |
Choose GPT-5.1-Codex if…
- No clear advantage on the data we hold.
Choose Gemini 3.6 Flash if…
- Costs less per token — $3.00 vs $3.44 blended
- Larger context window (1.0M)
- Newer model (released Jul 2026)
FAQ
Which is better, GPT-5.1-Codex or Gemini 3.6 Flash?
We do not hold independently-run benchmark scores covering both GPT-5.1-Codex and Gemini 3.6 Flash, so we make no quality claim. Their pricing and specifications are compared on this page.
Is GPT-5.1-Codex cheaper than Gemini 3.6 Flash?
Gemini 3.6 Flash is cheaper: $3.00 versus $3.44 per million tokens blended at 3:1 input:output. Input alone: $1.25 vs $1.50. Output alone: $10.00 vs $7.50.
What context windows do GPT-5.1-Codex and Gemini 3.6 Flash have?
GPT-5.1-Codex: 400,000 tokens. Gemini 3.6 Flash: 1,048,576 tokens.
Who makes GPT-5.1-Codex and Gemini 3.6 Flash?
GPT-5.1-Codex is made by OpenAI. Gemini 3.6 Flash is made by Google.