Model comparison
DeepSeek-V3.2-Exp vs GPT-5.5
GPT-5.5 is the stronger model overall, scoring 63.4 to 44.9 on the Noometry Index. DeepSeek-V3.2-Exp costs 39× less per token, which makes it the better buy when GPT-5.5's lead doesn't matter for your workload.
Last verified . 40 shared benchmarks.
DeepSeekSummary
- They share 40 benchmarks with published results for both. DeepSeek-V3.2-Exp scores higher in 0 categories and GPT-5.5 in 9 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.5 leads 72.7 to 22.0.
- The biggest single-benchmark swing is ARC-AGI-2: 4% for DeepSeek-V3.2-Exp and 85% for GPT-5.5.
- DeepSeek-V3.2-Exp is cheaper at $0.26 / $0.38 per million input/output tokens, against $5 / $30 for GPT-5.5.
- GPT-5.5 accepts more context: 1.05M tokens versus 164K.
- DeepSeek-V3.2-Exp has downloadable open weights; the other is API-only.
Side by side
| DeepSeek-V3.2-Exp | GPT-5.5 | |
|---|---|---|
| Provider | DeepSeek | OpenAI |
| Noometry Index | 44.9 | 63.4 |
| Released | 2025-09-29 | 2026-04-23 |
| Weights | Open | Proprietary |
| Context window | 164K | 1.05M |
| Max output | 66K | 128K |
| Input $ / M tokens | $0.26 | $5 |
| Output $ / M tokens | $0.38 | $30 |
| Results tracked | 48 | 71 |
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Category by category
Coding GPT-5.5 leads
DeepSeek-V3.2-Exp: 46.4 (#61), GPT-5.5: 58.3 (#13)
| Benchmark | DeepSeek-V3.2-Exp | GPT-5.5 |
|---|---|---|
| LMArena WebDev | 1362 | 1512 |
| SciCode | 38.9% | 56.1% |
| WeirdML | 39.5% | 84.9% |
| LMArena Coding | 1454 | 1494 |
| SWE-bench Verified | — | 80.6% |
| DeepSWE | — | 67% |
| FrontierCode | — | 43% |
| SWE-bench Verified (bash only) | 70% | — |
| Aider Polyglot | 74.2% | — |
| SWE-bench Multilingual | 59% | — |
| GSO | — | 40.2% |
| MirrorCode | — | 10% |
| ALE-Bench | — | 1,943 |
Agentic & Tool Use GPT-5.5 leads
DeepSeek-V3.2-Exp: 37.9 (#31), GPT-5.5: 50.7 (#6)
| Benchmark | DeepSeek-V3.2-Exp | GPT-5.5 |
|---|---|---|
| Terminal-Bench | 39.6% | 84.7% |
| Vending-Bench 2 | 1,034 | 7,524 |
| APEX-Agents | — | 55.1% |
| Berkeley Function Calling Leaderboard | 56.7% | — |
| OSWorld 2.0 | — | 13% |
| Remote Labor Index | — | 6.3% |
| TheAgentCompany | 42.9% | — |
| τ²-bench Banking | — | 44.6% |
| DeepResearch Bench | — | 54% |
| PostTrainBench | — | 27.2% |
| ExploitBench | — | 47.4% |
| GBAEval | — | 53.2% |
| GDP.pdf | — | 26% |
| LMArena Search | — | 1242 |
Reasoning GPT-5.5 leads
DeepSeek-V3.2-Exp: 22.0 (#185), GPT-5.5: 72.7 (#8)
| Benchmark | DeepSeek-V3.2-Exp | GPT-5.5 |
|---|---|---|
| ARC-AGI-2 | 4% | 85% |
| Kagi LLM Benchmark | 52.2% | 88.8% |
| NYT Connections (extended) | 36.7% | 96.2% |
| ARC-AGI-1 | 57% | 95% |
| CritPt | 2.9% | 27.1% |
| Chess Puzzles | 14% | 54% |
| LMArena Hard Prompts | 1433 | 1489 |
| DTBench | 87.7% | 96% |
| LMCA | 29.1% | 54.3% |
| Epoch Capabilities Index | 146.28 | 159.25 |
| SimpleBench | — | 69% |
| Thematic Generalization | 65% | — |
| EBR-Bench | — | 34.3% |
| Mystery Game Puzzles | — | 56% |
| Surface Evolver Bench | — | 88.1% |
| Bench to the Future 3 | — | 0.14 |
| ForecastBench | — | 60.6 |
Math GPT-5.5 leads
DeepSeek-V3.2-Exp: 40.8 (#75), GPT-5.5: 81.5 (#9)
| Benchmark | DeepSeek-V3.2-Exp | GPT-5.5 |
|---|---|---|
| MathArena Final-Answer Competitions | 57.7% | 94.3% |
| OTIS Mock AIME 2024-2025 | 87.8% | 100% |
| ProofBench | 8% | 50% |
| LMArena Math | 1435 | 1486 |
| FrontierMath (Feb 2025 set) | 22.1% | 51.7% |
| FrontierMath Tier 4 (v1) | 2.1% | 35.4% |
| FrontierMath (Tiers 1-3) | — | 85.3% |
| FrontierMath Tier 4 | — | 72.5% |
| FrontierMath Erdős | — | 0% |
Knowledge GPT-5.5 leads
DeepSeek-V3.2-Exp: 51.6 (#61), GPT-5.5: 64.4 (#14)
| Benchmark | DeepSeek-V3.2-Exp | GPT-5.5 |
|---|---|---|
| GPQA Diamond | 83.4% | 94% |
| Vectara Hallucination Rate | 5.3% | 9.3% |
| LMArena Expert | 1436 | 1508 |
| SimpleQA Verified | — | 63% |
Multimodal Not comparable
DeepSeek-V3.2-Exp: —, GPT-5.5: 47.1 (#11)
| Benchmark | DeepSeek-V3.2-Exp | GPT-5.5 |
|---|---|---|
| LMArena Vision | — | 1297 |
| Blueprint-Bench 2 | — | 36.2% |
| Furniture Assembly | — | 44.2% |
| LMArena Document | — | 1486 |
Multilingual GPT-5.5 leads
DeepSeek-V3.2-Exp: 52.4 (#85), GPT-5.5: 56.5 (#19)
| Benchmark | DeepSeek-V3.2-Exp | GPT-5.5 |
|---|---|---|
| LMArena Non-English | 1409 | 1467 |
| LMArena Chinese | 1461 | 1535 |
| LMArena French | 1435 | 1486 |
| LMArena German | 1440 | 1478 |
| LMArena Japanese | 1377 | 1498 |
| LMArena Korean | 1372 | 1461 |
| LMArena Russian | 1423 | 1473 |
| LMArena Spanish | 1441 | 1469 |
Instruction Following GPT-5.5 leads
DeepSeek-V3.2-Exp: 74.7 (#89), GPT-5.5: 77.7 (#18)
| Benchmark | DeepSeek-V3.2-Exp | GPT-5.5 |
|---|---|---|
| LMArena Instruction Following | 1413 | 1479 |
Long Context Too close to call
DeepSeek-V3.2-Exp: 47.6 (#15), GPT-5.5: 48.3 (#12)
| Benchmark | DeepSeek-V3.2-Exp | GPT-5.5 |
|---|---|---|
| CL-bench Life | 9.5% | 22.2% |
| LMArena Longer Query | 1428 | 1484 |
| Fiction.LiveBench | 83.3% | — |
| CL-bench | 13.2% | — |
Writing & Preference GPT-5.5 leads
DeepSeek-V3.2-Exp: 62.5 (#73), GPT-5.5: 72.8 (#13)
| Benchmark | DeepSeek-V3.2-Exp | GPT-5.5 |
|---|---|---|
| LMArena Text | 1425 | 1471 |
| LMArena Creative Writing | 1403 | 1455 |
| EQ-Bench Creative Writing | 1515 | 1844 |
| LMArena Multi-Turn | 1427 | 1477 |
| EQ-Bench 4 | — | 1315 |
Frequently asked questions
Is DeepSeek-V3.2-Exp better than GPT-5.5?
GPT-5.5 is the stronger model overall, scoring 63.4 to 44.9 on the Noometry Index. DeepSeek-V3.2-Exp costs 39× less per token, which makes it the better buy when GPT-5.5's lead doesn't matter for your workload.
Which is cheaper, DeepSeek-V3.2-Exp or GPT-5.5?
DeepSeek-V3.2-Exp is cheaper. It lists at $0.26 per million input tokens and $0.38 per million output tokens; GPT-5.5 lists at $5 and $30.
Is DeepSeek-V3.2-Exp or GPT-5.5 better for coding?
GPT-5.5 scores higher on coding benchmarks: 58.3 versus 46.4 in the Noometry coding category.
Which has the bigger context window?
GPT-5.5 does, with 1.05M tokens against 164K.
How many benchmarks do DeepSeek-V3.2-Exp and GPT-5.5 share?
40 benchmarks have published results for both models. DeepSeek-V3.2-Exp has 48 scored results on Noometry and GPT-5.5 has 71.