Compare / head-to-head
GPT-5.5 ProvsLongCat 2.0
GPT-5.5 Pro leads 1 of 1 shared benchmark. GPT-5.5 Pro has the larger context window (1.1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
1 – 0
GPT-5.5 Pro leads
Cheaper per token
—
list price, input + output
Larger context
GPT-5.5 Pro
1.1M tokens
Provider uptime (30d)
95.1368% · —
OpenAI · Meituan LongCat
GPT-5.5 Pro
OpenAI · released 2026-04-23
textvision
LongCat 2.0
Meituan LongCat · released 2026-06-30
text
- Context
- 1M
- Max out
- —
- Input /1M
- —
- Output /1M
- —
- Cached /1M
- —
- Scores
- 10 · 4 core
Quality
Benchmark matrix
1 shared · 7 only GPT-5.5 Pro · 9 only LongCat 2.0| Benchmark | GPT-5.5 Pro | LongCat 2.0 | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 1 | ||||
| BrowseComp | 90.1% ↗ | 79.9% ↗ | +10.2 pt | GPT-5.5 Pro |
| Only GPT-5.5 Pro reports · 7 | ||||
| Humanity's Last Exam (no tools) | 43.1% ↗ | not reported | — | — |
| FrontierMath Tier 1-3 | 52.4% ↗ | not reported | — | — |
| FrontierMath Tier 4 | 39.6% ↗ | not reported | — | — |
| FrontierMath Tier 4 v2 (Epoch AI run) | 78% ↗epoch | not reported | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 87.7% ↗epoch | not reported | — | — |
| GDPval (wins or ties) | 82.3% ↗ | not reported | — | — |
| Humanity's Last Exam (with tools) | 57.2% ↗ | not reported | — | — |
| Only LongCat 2.0 reports · 9 | ||||
| GPQA Diamond | not reported | 88.9% ↗ | — | — |
| FORTE | not reported | 73.2% ↗ | — | — |
| IFEval | not reported | 90% ↗ | — | — |
| IMO-AnswerBench | not reported | 81.8% ↗ | — | — |
| RWSearch | not reported | 78.8% ↗ | — | — |
| SWE-bench Multilingual | not reported | 77.3% ↗ | — | — |
| SWE-bench Pro | not reported | 59.5% ↗ | — | — |
| Terminal-Bench 2.1 | not reported | 70.8% ↗ | — | — |
| Writing Bench | not reported | 83.8% ↗ | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is GPT-5.5 Pro minus LongCat 2.0 in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | GPT-5.5 Pro | LongCat 2.0 | Edge |
|---|---|---|---|
| Context window | 1.1M tokens | 1M tokens | GPT-5.5 Pro |
| Max output | 128K tokens | — | — |
| Input price / 1M | $30 ↗ | — | — |
| Output price / 1M | $180 ↗ | — | — |
| Cached input / 1M | — | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $210 | — | — |
| Modalities | text · vision | text | GPT-5.5 Pro |
| Released | 2026-04-23 | 2026-06-30 | — |
| Cited benchmark scores | 8 | 10 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
GPT-5.5 Pro vs …
Models sharing the most benchmarksMore matchups
LongCat 2.0 vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run GPT-5.5 Pro and LongCat 2.0 on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.