Compare / head-to-head
DeepSeek R1vsGPT-5.5
GPT-5.5 leads 3 of 3 shared benchmarks. GPT-5.5 has the larger context window (1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0 – 3
GPT-5.5 leads
Cheaper per token
—
list price, input + output
Larger context
GPT-5.5
1M tokens
Provider uptime (30d)
100% · 94.8553%
DeepSeek · OpenAI
DeepSeek R1
DeepSeek · released 2025-01-20
text
- Context
- 128K
- Max out
- 33K
- Input /1M
- —
- Output /1M
- —
- Cached /1M
- —
- Scores
- 8 · 7 core
Quality
Benchmark matrix
3 shared · 4 only DeepSeek R1 · 18 only GPT-5.5| Benchmark | DeepSeek R1 | GPT-5.5 | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 3 | ||||
| GPQA Diamond | 71.5% ↗ | 90.7% ↗epoch | -19.2 pt | GPT-5.5 |
| LMArena Elo | 1372.6 ↗ | 1465.6 ↗ | -93 | GPT-5.5 |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 53.3% ↗epoch | 84.4% ↗epoch | -31.1 pt | GPT-5.5 |
| Only DeepSeek R1 reports · 4 | ||||
| SWE-bench Verified | 49.2% ↗ | not reported | — | — |
| MMLU | 90.8% ↗ | not reported | — | — |
| MMLU-Pro | 84% ↗ | not reported | — | — |
| AIME 2025 | 70% ↗matharena | not reported | — | — |
| Only GPT-5.5 reports · 18 | ||||
| AIME 2026 | not reported | 100% ↗matharena ⚠ | — | — |
| ARC-AGI-1 (Verified) | not reported | 95% ↗ | — | — |
| ARC-AGI-2 (Verified) | not reported | 85% ↗ | — | — |
| BrowseComp | not reported | 84.4% ↗ | — | — |
| FrontierMath Tier 1-3 | not reported | 51.7% ↗ | — | — |
| FrontierMath Tier 4 | not reported | 35.4% ↗ | — | — |
| FrontierMath Tier 4 v2 (Epoch AI run) | not reported | 72.5% ↗epoch | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | not reported | 85.3% ↗epoch | — | — |
| GDPval (wins or ties) | not reported | 84.9% ↗ | — | — |
| MCP Atlas | not reported | 75.3% ↗ | — | — |
| MMMU-Pro (no tools) | not reported | 81.2% ↗ | — | — |
| MMMU-Pro (with tools) | not reported | 83.2% ↗ | — | — |
| OSWorld-Verified | not reported | 78.7% ↗ | — | — |
| SimpleQA Verified | not reported | 63% ↗epoch | — | — |
| SWE-Bench Pro | not reported | 58.6% ↗ | — | — |
| Tau2-bench Telecom | not reported | 98% ↗ | — | — |
| Terminal-Bench 2.0 | not reported | 82.7% ↗ | — | — |
| Toolathlon | not reported | 55.6% ↗ | — | — |
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 DeepSeek R1 minus GPT-5.5 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 | DeepSeek R1 | GPT-5.5 | Edge |
|---|---|---|---|
| Context window | 128K tokens | 1M tokens | GPT-5.5 |
| Max output | 33K tokens | 128K tokens | GPT-5.5 |
| Input price / 1M | — | $5 ↗ | — |
| Output price / 1M | — | $30 ↗ | — |
| Cached input / 1M | — | $0.5 ↗ | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | — | $35 | — |
| Modalities | text | text · vision | GPT-5.5 |
| Released | 2025-01-20 | 2026-04-23 | — |
| Cited benchmark scores | 8 | 21 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
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