Gemini 3.1 Flash Lite Preview vs GPT-5 Codex
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for Gemini 3.1 Flash Lite Preview and GPT-5 Codex.
Gemini 3.1 Flash Lite Preview
Gemini 3.1 Flash Lite Preview is Google's high-efficiency model optimized for high-volume use cases. It outperforms Gemini 2.5 Flash Lite on overall quality and approaches Gemini 2.5 Flash performance across...
GPT-5 Codex
GPT-5-Codex is a specialized version of GPT-5 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....
Technical Specifications
| Specification | Gemini 3.1 Flash Lite Preview | GPT-5 Codex |
|---|---|---|
| Provider | OpenAI | |
| Context Window | 1,048,576 tokens | 400,000 tokens |
| Agent Suitability | N/A | N/A |
| Time to First Token (TTFT) | N/A | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | beta | stable |
| API Available | Yes | Yes |
| Released Date | 2026-03-03 | 2025-09-23 |
API Pricing Comparison
Input Price per Million Tokens
Gemini 3.1 Flash Lite Preview
$0.25
GPT-5 Codex
$1.25
Output Price per Million Tokens
Gemini 3.1 Flash Lite Preview
$1.50
GPT-5 Codex
$10.00
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Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
Gemini 3.1 Flash Lite Preview Quirks & Gotchas
No developer gotchas reported.
GPT-5 Codex Quirks & Gotchas
No developer gotchas reported.