Model comparison
DeepSeek-V3.1-Terminus vs GPT-4o mini
DeepSeek-V3.1-Terminus is the stronger model overall, scoring 42.6 to 25.4 on the Noometry Index. GPT-4o mini costs 1.8× less per token, which makes it the better buy when DeepSeek-V3.1-Terminus's lead doesn't matter for your workload.
Last verified . 13 shared benchmarks.
DeepSeekSummary
- They share 13 benchmarks with published results for both. DeepSeek-V3.1-Terminus scores higher in 7 categories and GPT-4o mini in 0 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in math, where DeepSeek-V3.1-Terminus leads 35.7 to 9.9.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 57.4% for DeepSeek-V3.1-Terminus and 28.8% for GPT-4o mini.
- GPT-4o mini is cheaper at $0.15 / $0.60 per million input/output tokens, against $0.30 / $1 for DeepSeek-V3.1-Terminus.
- DeepSeek-V3.1-Terminus accepts more context: 164K tokens versus 128K.
- DeepSeek-V3.1-Terminus has downloadable open weights; the other is API-only.
Side by side
| DeepSeek-V3.1-Terminus | GPT-4o mini | |
|---|---|---|
| Provider | DeepSeek | OpenAI |
| Noometry Index | 42.6 | 25.4 |
| Released | 2025-09-22 | 2024-07-18 |
| Weights | Open | Proprietary |
| Context window | 164K | 128K |
| Max output | 66K | 16K |
| Input $ / M tokens | $0.30 | $0.15 |
| Output $ / M tokens | $1 | $0.60 |
| Results tracked | 16 | 60 |
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Category by category
Coding DeepSeek-V3.1-Terminus leads
DeepSeek-V3.1-Terminus: 41.5 (#114), GPT-4o mini: 21.6 (#330)
| Benchmark | DeepSeek-V3.1-Terminus | GPT-4o mini |
|---|---|---|
| LMArena Coding | 1426 | 1290 |
| Aider Polyglot | — | 3.6% |
| SciCode | 40.6% | — |
| WeirdML | — | 11.8% |
| BigCodeBench Instruct | — | 46.1% |
| LiveBench Coding | — | 43.1% |
| BigCodeBench Complete | — | 57.4% |
| ALE-Bench | 745.17 | — |
| HumanEval+ | — | 83.5% |
| MBPP+ | — | 72.2% |
Agentic & Tool Use Not comparable
DeepSeek-V3.1-Terminus: —, GPT-4o mini: 27.2 (#95)
| Benchmark | DeepSeek-V3.1-Terminus | GPT-4o mini |
|---|---|---|
| BALROG | — | 17.4% |
Reasoning DeepSeek-V3.1-Terminus leads
DeepSeek-V3.1-Terminus: 25.7 (#126), GPT-4o mini: 8.7 (#343)
| Benchmark | DeepSeek-V3.1-Terminus | GPT-4o mini |
|---|---|---|
| Kagi LLM Benchmark | 57.4% | 28.8% |
| LMArena Hard Prompts | 1427 | 1267 |
| DTBench | 81.3% | 54.4% |
| LMCA | 28.6% | 10.4% |
| ARC-AGI-2 | — | 0% |
| SimpleBench | — | 10.7% |
| CritPt | 1.7% | — |
| Chess Puzzles | — | 0% |
| LiveBench Reasoning | — | 32.8% |
| Mystery Game Puzzles | — | 12% |
| LiveBench Data Analysis | — | 50% |
| Epoch Capabilities Index | — | 126.56 |
| LiveBench | — | 41.3% |
| PIQA | — | 88.7% |
Math DeepSeek-V3.1-Terminus leads
DeepSeek-V3.1-Terminus: 35.7 (#138), GPT-4o mini: 9.9 (#307)
| Benchmark | DeepSeek-V3.1-Terminus | GPT-4o mini |
|---|---|---|
| LMArena Math | 1402 | 1267 |
| FrontierMath (Tiers 1-3) | — | 0.7% |
| OTIS Mock AIME 2024-2025 | — | 6.9% |
| Omni-MATH | — | 28% |
| LiveBench Math | — | 36.3% |
| MATH Level 5 | — | 52.6% |
| GSM8K | — | 91.3% |
Knowledge Not comparable
DeepSeek-V3.1-Terminus: —, GPT-4o mini: 17.7 (#279)
| Benchmark | DeepSeek-V3.1-Terminus | GPT-4o mini |
|---|---|---|
| GPQA Diamond | — | 37.7% |
| SimpleQA Verified | — | 8.3% |
| MMLU-Pro | — | 60.3% |
| Confabulations | — | 37.2% |
| GPQA (HELM) | — | 36.8% |
| LMArena Expert | — | 1235 |
| BoolQ | — | 88.7% |
| MMLU | — | 81.8% |
Multimodal Not comparable
DeepSeek-V3.1-Terminus: —, GPT-4o mini: 25.3 (#117)
| Benchmark | DeepSeek-V3.1-Terminus | GPT-4o mini |
|---|---|---|
| LMArena Vision | — | 1066 |
| Video-MME | — | 64.8% |
| GeoBench | — | 64% |
| VPCT | — | 34% |
Multilingual DeepSeek-V3.1-Terminus leads
DeepSeek-V3.1-Terminus: 52.3 (#87), GPT-4o mini: 42.2 (#194)
| Benchmark | DeepSeek-V3.1-Terminus | GPT-4o mini |
|---|---|---|
| LMArena Non-English | 1407 | 1266 |
| LMArena Russian | 1434 | 1275 |
| LMArena Chinese | — | 1264 |
| LMArena French | — | 1296 |
| LMArena German | — | 1272 |
| LMArena Japanese | — | 1216 |
| LMArena Korean | — | 1195 |
| LMArena Spanish | — | 1276 |
Instruction Following DeepSeek-V3.1-Terminus leads
DeepSeek-V3.1-Terminus: 74.4 (#96), GPT-4o mini: 62.1 (#234)
| Benchmark | DeepSeek-V3.1-Terminus | GPT-4o mini |
|---|---|---|
| LMArena Instruction Following | 1406 | 1259 |
| LiveBench Instruction Following | — | 56.8% |
| IFEval | — | 78.2% |
Long Context DeepSeek-V3.1-Terminus leads
DeepSeek-V3.1-Terminus: 43.5 (#88), GPT-4o mini: 39.1 (#181)
| Benchmark | DeepSeek-V3.1-Terminus | GPT-4o mini |
|---|---|---|
| LMArena Longer Query | 1426 | 1289 |
Writing & Preference DeepSeek-V3.1-Terminus leads
DeepSeek-V3.1-Terminus: 61.3 (#87), GPT-4o mini: 39.7 (#243)
| Benchmark | DeepSeek-V3.1-Terminus | GPT-4o mini |
|---|---|---|
| LMArena Text | 1420 | 1286 |
| LMArena Creative Writing | 1404 | 1268 |
| LMArena Multi-Turn | 1411 | 1285 |
| Short-Story Creative Writing | — | 67.2% |
| EQ-Bench Creative Writing | — | 873 |
| WildBench | — | 79.1% |
| LiveBench Language | — | 28.6% |
Frequently asked questions
Is DeepSeek-V3.1-Terminus better than GPT-4o mini?
DeepSeek-V3.1-Terminus is the stronger model overall, scoring 42.6 to 25.4 on the Noometry Index. GPT-4o mini costs 1.8× less per token, which makes it the better buy when DeepSeek-V3.1-Terminus's lead doesn't matter for your workload.
Which is cheaper, DeepSeek-V3.1-Terminus or GPT-4o mini?
GPT-4o mini is cheaper. It lists at $0.15 per million input tokens and $0.60 per million output tokens; DeepSeek-V3.1-Terminus lists at $0.30 and $1.
Is DeepSeek-V3.1-Terminus or GPT-4o mini better for coding?
DeepSeek-V3.1-Terminus scores higher on coding benchmarks: 41.5 versus 21.6 in the Noometry coding category.
Which has the bigger context window?
DeepSeek-V3.1-Terminus does, with 164K tokens against 128K.
How many benchmarks do DeepSeek-V3.1-Terminus and GPT-4o mini share?
13 benchmarks have published results for both models. DeepSeek-V3.1-Terminus has 16 scored results on Noometry and GPT-4o mini has 60.