GPT-5.3 Codex vs LongCat-Flash-Lite: Specs & Benchmark Comparison
| Characteristic | GPT-5.3 Codex | LongCat-Flash-Lite |
|---|---|---|
| Company | OpenAI | Meituan |
| Release Date | February 5, 2026 | February 4, 2026 |
| Parameters | — | 69B |
| Multimodal | Yes | No |
| Context (input) | 400K | — |
| Context (output) | 128K | — |
| Input Price / 1M | $1.75 | — |
| Output Price / 1M | $14.00 | — |
| Average Score | 0.7 | 0.8 |
Verdict
Both models show equal results — the choice depends on your specific use case.
Overall Performance
Both models show comparable average scores: GPT-5.3 Codex — 0.7, LongCat-Flash-Lite — 0.8.
Recency
Both models were released around the same time: 2/5/2026 and 2/4/2026.
More About These Models
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The GPT-5.3 Codex and LongCat-Flash-Lite comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the GPT-5.3 Codex or LongCat-Flash-Lite page. See also the complete list of AI model comparisons.