Model comparison
DeepSeek V3.1 (Reasoning) vs GPT-5.6 Sol
Head-to-head evidence from 11 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: DeepSeek V3.1 (Reasoning) #97 (Supported); GPT-5.6 Sol #3 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. DeepSeek V3.1 (Reasoning) and GPT-5.6 Sol share 11 comparable benchmark results. 0 of 8 categories are comparable. 1 result is unique to DeepSeek V3.1 (Reasoning); 35 to GPT-5.6 Sol.
Updated July 23, 2026- Shared results
- 11
- DeepSeek V3.1 (Reasoning) only
- 1
- GPT-5.6 Sol only
- 35
- Comparable categories
- 0 / 8
Benchmark data for DeepSeek V3.1 (Reasoning) and GPT-5.6 Sol is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 11 shared benchmark results across 5 evidence categories; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
GPT-5.6 Sol is priced at $5.00 input / $30.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for DeepSeek V3.1 (Reasoning). GPT-5.6 Sol has the larger context window at 1M, compared with 128K for DeepSeek V3.1 (Reasoning).
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | DeepSeek V3.1 (Reasoning) | Δ | GPT-5.6 Sol |
|---|---|---|---|
| Agentic | DeepSeek V3.1 (Reasoning)Not measured | MarginNo overlap | GPT-5.6 Sol92.0 |
| Coding | DeepSeek V3.1 (Reasoning)Not measured | MarginNo overlap | GPT-5.6 Sol64.6 |
| Knowledge | DeepSeek V3.1 (Reasoning)Not measured | MarginNo overlap | GPT-5.6 Sol94.6 |
| Math | DeepSeek V3.1 (Reasoning)Not measured | MarginNo overlap | GPT-5.6 Sol87.5 |
| Multimodal | DeepSeek V3.1 (Reasoning)Not measured | MarginNo overlap | GPT-5.6 Sol83.0 |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | DeepSeek V3.1 (Reasoning) | GPT-5.6 Sol | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | DeepSeek V3.1 (Reasoning)$0 input / $0 output | GPT-5.6 Sol$5 input / $30 output | DeepSeek V3.1 (Reasoning) has the lower combined listed price. |
| Generation speedtokens per second | DeepSeek V3.1 (Reasoning)Not available | GPT-5.6 SolNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | DeepSeek V3.1 (Reasoning)Not available | GPT-5.6 SolNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | DeepSeek V3.1 (Reasoning)128K | GPT-5.6 Sol1M | GPT-5.6 Sol lists the larger context window. |
Benchmark Deep Dive
Agentic17 benchmarks
| Benchmark | DeepSeek V3.1 (Reasoning) | GPT-5.6 Sol | Result |
|---|---|---|---|
| τ²-bench resultsSource | 37.4% | 85.1% | GPT-5.6 Sol leads |
| Terminal-Bench 2.0Source | — | 91.9% | Not comparable |
| BrowseCompSource | — | 92.2% | Not comparable |
| OSWorld 2.0Source | — | 62.6% | Not comparable |
| CyberGymSource | — | 84.5% | Not comparable |
| ExploitGymSource | — | 33.7% | Not comparable |
| ToolathlonSource | — | 58% | Not comparable |
| AA Agentic IndexSource | — | 54.0% | Not comparable |
| GDPval-AASource | — | 61.8% | Not comparable |
| GDPval-AASource | — | 1736 | Not comparable |
| AA BriefcaseSource | — | 1501 | Not comparable |
| AA ITBenchSource | — | 56.2% | Not comparable |
| AA Tau3 BankingSource | — | 33.0% | Not comparable |
| AA AutomationBenchSource | — | 51.2% | Not comparable |
| AA Harvey LABSource | — | 87.2% | Not comparable |
| terminalBenchHardSource | — | 65.9% | Not comparable |
| aaTerminalBench21Source | — | 88% | Not comparable |
Coding8 benchmarks
| Benchmark | DeepSeek V3.1 (Reasoning) | GPT-5.6 Sol | Result |
|---|---|---|---|
| AA-SciCodeSource | 39.1% | 56.1% | GPT-5.6 Sol leads |
| SWE-bench ProSource | — | 64.6% | Not comparable |
| Terminal-Bench 2.0Source | — | 91.9% | Not comparable |
| deepSweSource | — | 72.7% | Not comparable |
| FrontierCode 1.1 ExtendedSource | — | 60.6% | Not comparable |
| cursorBench32Source | — | 67.2% | Not comparable |
| VulcanBench v3Source | — | 87.0% | Not comparable |
| AA Coding IndexSource | — | 77.4% | Not comparable |
Reasoning4 benchmarks
Knowledge10 benchmarks
| Benchmark | DeepSeek V3.1 (Reasoning) | GPT-5.6 Sol | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 20.7% | 58.9% | GPT-5.6 Sol leads |
| AA-GPQA DiamondSource | 77.9% | 94.1% | GPT-5.6 Sol leads |
| AA-HLESource | 13.0% | 47.2% | GPT-5.6 Sol leads |
| AA-Omniscience IndexSource | -28.4% | 21.7% | GPT-5.6 Sol leads |
| AA-Omniscience AccuracySource | 28.8% | 58.5% | GPT-5.6 Sol leads |
| AA-Omniscience Hallucination RateSource | 80.3% | 88.8% | DeepSeek V3.1 (Reasoning) leads |
| GPQASource | — | 94.6% | Not comparable |
| GPQA-DSource | — | 94.6% | Not comparable |
| HealthBench ProfessionalSource | — | 60.5% | Not comparable |
| HealthBench HardSource | — | 33.1% | Not comparable |
Math3 benchmarks
Multimodal4 benchmarks
Inst. Following1 benchmarks
| Benchmark | DeepSeek V3.1 (Reasoning) | GPT-5.6 Sol | Result |
|---|---|---|---|
| AA-IFBenchSource | 41.5% | 72.7% | GPT-5.6 Sol leads |
Frequently Asked Questions (3)
Can I compare DeepSeek V3.1 (Reasoning) and GPT-5.6 Sol on BenchLM yet?
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
Why does this comparison show “coming soon”?
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
What data is available for DeepSeek V3.1 (Reasoning) and GPT-5.6 Sol today?
DeepSeek V3.1 (Reasoning): $0.00 input / $0.00 output per 1M tokens GPT-5.6 Sol: $5.00 input / $30.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
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