token.app › Compare › GPT-5.1-Codex vs Gemini 3.5 Flash Lite
GPT-5.1-Codex vs Gemini 3.5 Flash Lite
Gemini 3.5 Flash Lite is 4.0× cheaper per token on a blended 3:1 basis. Gemini 3.5 Flash Lite accepts the larger context window (1.0M).
Head to head
Blended price uses a 3:1 input:output mix
| GPT-5.1-Codex | Gemini 3.5 Flash Lite | |
|---|---|---|
| Provider | OpenAI | |
| Input $/1M | $1.25 | $0.300 |
| Output $/1M | $10.00 | $2.50 |
| Blended $/1M | $3.44 | $0.850 |
| 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 3.5 Flash Lite if…
- Costs less per token — $0.850 vs $3.44 blended
- Larger context window (1.0M)
- Newer model (released Jul 2026)
FAQ
Which is better, GPT-5.1-Codex or Gemini 3.5 Flash Lite?
We do not hold independently-run benchmark scores covering both GPT-5.1-Codex and Gemini 3.5 Flash Lite, so we make no quality claim. Their pricing and specifications are compared on this page.
Is GPT-5.1-Codex cheaper than Gemini 3.5 Flash Lite?
Gemini 3.5 Flash Lite is cheaper: $0.850 versus $3.44 per million tokens blended at 3:1 input:output. Input alone: $1.25 vs $0.300. Output alone: $10.00 vs $2.50.
What context windows do GPT-5.1-Codex and Gemini 3.5 Flash Lite have?
GPT-5.1-Codex: 400,000 tokens. Gemini 3.5 Flash Lite: 1,048,576 tokens.
Who makes GPT-5.1-Codex and Gemini 3.5 Flash Lite?
GPT-5.1-Codex is made by OpenAI. Gemini 3.5 Flash Lite is made by Google.