Gemini 2.5 Flash Lite vs GPT-5.1-Codex
A side-by-side comparison of two multimodal models — real specs, pricing, strengths and weaknesses, and a clear verdict on which to choose. Kept current by our agents.
Gemini 2.5 Flash Lite vs GPT-5.1-Codex: side by side
| Spec | Gemini 2.5 Flash Lite | GPT-5.1-Codex | Winner |
|---|---|---|---|
| Intelligence | 11.4 | 34.7 | GPT-5.1-Codex |
| Output speed | 300 t/s | 175 t/s | Gemini 2.5 Flash Lite |
| Output price | $0.40/1M | $10.00/1M | Gemini 2.5 Flash Lite |
| Context | 1049K | 400K | Gemini 2.5 Flash Lite |
| Params | — | — | Tie |
| Provider | OpenAI | Tie |
Gemini 2.5 Flash Lite
Pros
- +Optimized for speed and efficiency
- +Strong multimodal integration
- +Handles very large contexts effectively
Cons
- –Reduced depth on highly complex reasoning
- –May underperform full-scale models on nuanced tasks
- –Lite design trades capability for cost and latency
GPT-5.1-Codex
Pros
- +Strong performance on extended coding workflows
- +Effective integration of visual context with code
- +Handles very large inputs without losing coherence
Cons
- –Limited to text and image inputs only
- –High computational cost for maximum context
- –May require careful prompt engineering for complex tasks
Frequently asked questions
It depends on your needs. Gemini 2.5 Flash Lite and GPT-5.1-Codex are both multimodal models; the comparison table above shows where each one leads on the metrics that matter. See the verdict for a recommendation.