GPT-5.1 Instant vs LongCat-Flash-Thinking: Specs & Benchmark Comparison
| Characteristic | GPT-5.1 Instant | LongCat-Flash-Thinking |
|---|---|---|
| Company | OpenAI | Meituan |
| Release Date | November 11, 2025 | September 21, 2025 |
| Parameters | — | 560B |
| Multimodal | Yes | No |
| Context (input) | 256K | — |
| Context (output) | 32K | — |
| Input Price / 1M | $0.30 | — |
| Output Price / 1M | $1.20 | — |
| Average Score | 0.9 | 0.9 |
| Benchmarks | ||
| SWE-Bench Verified | 0.8 | 0.6 |
| TAU2 Telecom | 1.0 | 0.8 |
| GPQA | 0.9 | 0.8 |
| AIME 2025 | 0.9 | 0.9 |
Visual Benchmark Comparison
GPT-5.1 Instant
LongCat-Flash-Thinking
SWE-Bench Verified0.8 vs 0.6
0.8
0.6
TAU2 Telecom1.0 vs 0.8
1.0
0.8
GPQA0.9 vs 0.8
0.9
0.8
AIME 20250.9 vs 0.9
0.9
0.9
Verdict
GPT-5.1 Instant leads in 1 out of 3 comparison categories.
Overall Performance
Both models show comparable average scores: GPT-5.1 Instant — 0.9, LongCat-Flash-Thinking — 0.9.
Programming
On SWE-Bench, both models are nearly equal: GPT-5.1 Instant — 0.8, LongCat-Flash-Thinking — 0.6.
Recency
GPT-5.1 Instant is newer: released 11/11/2025 vs 9/21/2025.
More About These Models
Related Comparisons
The GPT-5.1 Instant and LongCat-Flash-Thinking comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the GPT-5.1 Instant or LongCat-Flash-Thinking page. See also the complete list of AI model comparisons.