Model comparison
DeepSeek LLM 67B vs GPT-5.5 Instant
GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 24.8 on the Noometry Index.
Last verified . 14 shared benchmarks.
DeepSeekSummary
- They share 14 benchmarks with published results for both. DeepSeek LLM 67B scores higher in 0 categories and GPT-5.5 Instant in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-5.5 Instant leads 48.9 to 7.1.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 0.8% for DeepSeek LLM 67B and 68.1% for GPT-5.5 Instant.
- DeepSeek LLM 67B has downloadable open weights; the other is API-only.
Side by side
| DeepSeek LLM 67B | GPT-5.5 Instant | |
|---|---|---|
| Provider | DeepSeek | OpenAI |
| Noometry Index | 24.8 | 42.5 |
| Released | 2023-11-29 | 2026-05-05 |
| Weights | Open | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 15 | 27 |
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Category by category
Coding GPT-5.5 Instant leads
DeepSeek LLM 67B: 31.3 (#273), GPT-5.5 Instant: 43.7 (#73)
| Benchmark | DeepSeek LLM 67B | GPT-5.5 Instant |
|---|---|---|
| LMArena Coding | 1096 | 1433 |
| SciCode | — | 48.6% |
Reasoning GPT-5.5 Instant leads
DeepSeek LLM 67B: 15.9 (#300), GPT-5.5 Instant: 24.2 (#149)
| Benchmark | DeepSeek LLM 67B | GPT-5.5 Instant |
|---|---|---|
| Chess Puzzles | 0% | 12% |
| LMArena Hard Prompts | 1070 | 1426 |
| Epoch Capabilities Index | 110.54 | 142.48 |
| CritPt | — | 0% |
Math GPT-5.5 Instant leads
DeepSeek LLM 67B: 8.1 (#318), GPT-5.5 Instant: 26.1 (#241)
| Benchmark | DeepSeek LLM 67B | GPT-5.5 Instant |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 0.8% | 68.1% |
| LMArena Math | 1108 | 1420 |
| FrontierMath (Tiers 1-3) | — | 26.3% |
| FrontierMath Tier 4 | — | 2.4% |
| MATH Level 5 | 6.4% | — |
Knowledge GPT-5.5 Instant leads
DeepSeek LLM 67B: 7.1 (#308), GPT-5.5 Instant: 48.9 (#68)
| Benchmark | DeepSeek LLM 67B | GPT-5.5 Instant |
|---|---|---|
| GPQA Diamond | 24.6% | 82.5% |
| LMArena Expert | — | 1409 |
Multimodal Not comparable
DeepSeek LLM 67B: —, GPT-5.5 Instant: 39.3 (#48)
| Benchmark | DeepSeek LLM 67B | GPT-5.5 Instant |
|---|---|---|
| LMArena Vision | — | 1250 |
| LMArena Document | — | 1403 |
Multilingual GPT-5.5 Instant leads
DeepSeek LLM 67B: 29.5 (#262), GPT-5.5 Instant: 53.0 (#76)
| Benchmark | DeepSeek LLM 67B | GPT-5.5 Instant |
|---|---|---|
| LMArena Non-English | 1073 | 1417 |
| LMArena Chinese | 1132 | 1457 |
| LMArena French | — | 1428 |
| LMArena German | — | 1410 |
| LMArena Japanese | — | 1408 |
| LMArena Korean | — | 1393 |
| LMArena Russian | — | 1430 |
| LMArena Spanish | — | 1430 |
Instruction Following GPT-5.5 Instant leads
DeepSeek LLM 67B: 55.7 (#272), GPT-5.5 Instant: 74.4 (#94)
| Benchmark | DeepSeek LLM 67B | GPT-5.5 Instant |
|---|---|---|
| LMArena Instruction Following | 1079 | 1407 |
Long Context GPT-5.5 Instant leads
DeepSeek LLM 67B: 33.1 (#260), GPT-5.5 Instant: 43.4 (#92)
| Benchmark | DeepSeek LLM 67B | GPT-5.5 Instant |
|---|---|---|
| LMArena Longer Query | 1092 | 1422 |
Writing & Preference GPT-5.5 Instant leads
DeepSeek LLM 67B: 31.8 (#277), GPT-5.5 Instant: 62.0 (#81)
| Benchmark | DeepSeek LLM 67B | GPT-5.5 Instant |
|---|---|---|
| LMArena Text | 1105 | 1419 |
| LMArena Creative Writing | 1067 | 1420 |
| LMArena Multi-Turn | 1082 | 1434 |
Frequently asked questions
Is DeepSeek LLM 67B better than GPT-5.5 Instant?
GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 24.8 on the Noometry Index.
Is DeepSeek LLM 67B or GPT-5.5 Instant better for coding?
GPT-5.5 Instant scores higher on coding benchmarks: 43.7 versus 31.3 in the Noometry coding category.
How many benchmarks do DeepSeek LLM 67B and GPT-5.5 Instant share?
14 benchmarks have published results for both models. DeepSeek LLM 67B has 15 scored results on Noometry and GPT-5.5 Instant has 27.