GPT-5.6 Terra vs Kimi K3.1 Pro Together
Full profiles: GPT-5.6 Terra (OpenAI) and Kimi K3.1 Pro Together (Moonshot AI): every benchmark, price and rank.
Updated · Data from 9 sources
As of 9 Nov 2026, GPT-5.6 Terra and Kimi K3.1 Pro Together are neck and neck on quality (60.5 vs 60.5 on the BenchLeader Index, inside the ±5.1 margin). Choose GPT-5.6 Terra for maths (68 vs 66); choose Kimi K3.1 Pro Together for knowledge (68 vs 49) and reasoning (67 vs 60).
Key facts (as of 9 Nov 2026)
- GPT-5.6 Terra scores 60.5 on the BenchLeader Index and Kimi K3.1 Pro Together scores 60.5 (BenchLeader, 9 Nov 2026).
- GPT-5.6 Terra costs $4.50 per 1M tokens blended (list price, 9 Nov 2026).
- Of the 7 benchmarks both models have, Kimi K3.1 Pro Together leads 4 (BenchLeader, 9 Nov 2026).
GPT-5.6 Terra benchmarks max OpenAI
Kimi K3.1 Pro Together benchmarks max Moonshot AIAdd a third modelWhich to pick for…
The pick's numbers come first. Category scores on the BenchLeader scale (50 is the average model, 15 points one standard deviation). High confidence means a lead of half a standard deviation or more; under one point is called either.
| Use case | Pick | Why | Confidence |
|---|---|---|---|
| Maths | GPT-5.6 Terra | 68 vs 66 category score; FrontierMath Tiers 1–3 86.0% vs 78.3% | Medium |
| Reasoning | Kimi K3.1 Pro Together | 67 vs 60 category score; GPQA Diamond 94.2% vs 93.3% | Medium |
| Knowledge | Kimi K3.1 Pro Together | 68 vs 49 category score; SimpleQA Verified 62.2% vs 43.2% | High |
| High volume on a budget | Neither flagship | A smaller model is usually the better fit: Cheapest good LLMs, Fastest LLMs | – |
Key differences
- GPT-5.6 Terra (max) and Kimi K3.1 Pro Together (max) are neck and neck on quality (60.5 vs 60.5, within the ±5.1 margin).
- GPT-5.6 Terra (max) is stronger in agents & tools, coding, instruction following, long context, maths, multimodal.
- Kimi K3.1 Pro Together (max) is stronger in knowledge, reasoning.
At a glance
| Spec | GPT-5.6 Terra | Kimi K3.1 Pro Together |
|---|---|---|
| Developer | OpenAI | Moonshot AI |
| Released | 9 Jul 2026 | 23 Oct 2026 |
| Context window (tokens) | 1,050,000 | – |
| Compared at | GPT-5.6 Terra (max) | Kimi K3.1 Pro Together (max) |
| Open weights | No | No |
| Price in / out / cached input per 1M | $2.00 / $12.00 / $0.200 | – |
Category by category
Category scores on the BenchLeader scale: 50 is the average evaluated model, 15 points is one standard deviation. A gap under one point is called level.
| Category | GPT-5.6 Terra (max) | Kimi K3.1 Pro Together (max) | Leader |
|---|---|---|---|
| Reasoning | 60.4 | 67.1 | Kimi K3.1 Pro Together |
| Coding | 59.2 | – | not comparable |
| Agents & tools | 58.9 | – | not comparable |
| Maths | 68.4 | 65.8 | GPT-5.6 Terra |
| Knowledge | 48.6 | 67.6 | Kimi K3.1 Pro Together |
| Instruction following | 70.0 | – | not comparable |
| Multimodal | 63.2 | – | not comparable |
| Long context | 66.3 | – | not comparable |
On one chart
Each domain on the index's own scale, where 50 is an average model. Click a domain to see the benchmarks behind it. Pick up to 5 models from the list.
Not drawn, measured for fewer than two of these models: Coding, Agents & tools, Instruction following, Long context, Multimodal, Human preference.
Where sources disagree
Across the 7 benchmarks both have, GPT-5.6 Terra leads 3, Kimi K3.1 Pro Together leads 4.
| Overall index | GPT-5.6 Terra (max) | Kimi K3.1 Pro Together (max) | Leader |
|---|---|---|---|
| BenchLeader Index | 60.5 | 60.5 | neck and neck |
Each publisher runs its own tasks, harnesses and effort settings, so their overall verdicts can differ; BenchLeader reconciles them on one scale. † measured at another effort setting of the same model (the publisher did not test the one compared here).
Price, speed and latency
List prices blended at three input tokens per output token. Per-task prices use the token counts on the methodology page. Cost, tokens and time per benchmark task are measured: Artificial Analysis’ averages over its whole Intelligence Index run.
| Measure | GPT-5.6 Terra (max) | Kimi K3.1 Pro Together (max) |
|---|---|---|
| Blended price per 1M tokens | $4.50 | – |
| Input / output per 1M | $2.00 / $12.00 | – / – |
| Cached input per 1M | $0.200 | – |
| Price per task: chat reply | $0.0044 | – |
| Price per task: summarize a 30-page report | $0.031 | – |
| Price per task: code edit | $0.030 | – |
| Price per task: agentic coding session | $0.168 | – |
| Price per task: structured extraction | $0.0064 | – |
| Agentic coding session, input mostly cached | $0.087 | – |
| Cost per benchmark task (AA Index) | $3.73 | – |
| Output tokens per task (AA Index) | 66k | – |
| Of which reasoning | 41k | – |
| Time per task (AA Index) | 10 min | – |
| Output speed | 106 tok/s | – |
| Time to first answer | 97.8 s | – |
| Time to a complete answer | 181.7 s | – |
Each model is compared at its best-ranked reasoning-effort setting. GPT-5.6 Terra (max) scores 60.5 and takes 98 s to its first answer token; GPT-5.6 Terra (xhigh) scores 60.3 in 17 s, GPT-5.6 Terra (high) scores 56.9 in 8 s. Kimi K3.1 Pro Together (max) scores 60.5. Higher effort means more thinking before the answer: better scores, longer waits and more tokens billed. How reasoning effort changes scores and cost.
Every benchmark
121 benchmarks, grouped by category; each name links to the board and its leaders. † measured at another effort setting of the same model, shown for reference and not counted as a win.
| Metric | Publisher | GPT-5.6 Terra (max) | Kimi K3.1 Pro Together (max) |
|---|---|---|---|
| BenchLeader Index | BenchLeader | 60.5 | 60.5 |
| Agents & tools score | BenchLeader | 58.9 | – |
| Coding score | BenchLeader | 59.2 | – |
| Instruction following score | BenchLeader | 70.0 | – |
| Knowledge score | BenchLeader | 48.6 | 67.6 |
| Long context score | BenchLeader | 66.3 | – |
| Maths score | BenchLeader | 68.4 | 65.8 |
| Multimodal score | BenchLeader | 63.2 | – |
| Reasoning score | BenchLeader | 60.4 | 67.1 |
| Blended price $/M | BenchLeader | $4.50 | – |
| Output speed | BenchLeader | 106 tok/s | – |
| Time to first answer | BenchLeader | 97.8 s | – |
| Context window | BenchLeader | 1,050,000 tokens | – |
| Reasoning | |||
| GPQA Diamond | Epoch AI Benchmarking Hub | 93.3% | 94.2% |
| SimpleBench | SimpleBench | 48.9%† | – |
| Arena Hard Prompts | Arena (LMArena) | 1491† | – |
| LiveBench 2.0 Reasoning | LiveBench | 90.6%† | – |
| LiveBench 1.0 Reasoning | LiveBench | 90.6% | – |
| GPQA Diamond (AA) | Artificial Analysis | 92.5% | – |
| Humanity's Last Exam (AA) | Artificial Analysis | 42.9% | – |
| HLE-Diamond (AA) | Artificial Analysis | 28.8% | – |
| GPQA Diamond (Vals) | Vals AI | 90.9%† | – |
| Kagi LLM Benchmark | Kagi LLM Benchmark | 51.3%† | – |
| ARC-AGI-1 | ARC Prize | 96.5% | – |
| ARC-AGI-2 | ARC Prize | 83.9% | – |
| ARC-AGI-3 | ARC Prize | 0.8% | – |
| CritPt | Artificial Analysis | 30.0% | – |
| CritPt v2 hard subset (AA) | Artificial Analysis | 50.5% | – |
| Chess Puzzles | Epoch AI Benchmarking Hub | 47.0% | 45.0% |
| Mystery Game Puzzles | Epoch AI Benchmarking Hub | 35.0% | 42.0% |
| LMCA | Epoch AI Benchmarking Hub | 55.0% | – |
| DTBench | Epoch AI Benchmarking Hub | 93.3% | – |
| Coding | |||
| SciCode | SciCode | 55.0% | – |
| WeirdML | WeirdML | 78.3%† | – |
| FrontierCode | Cognition | 41.3%† | – |
| Arena Coding | Arena (LMArena) | 1518† | – |
| Arena WebDev | Arena (LMArena) | 1520† | – |
| LiveBench 2.0 Coding | LiveBench | 84.2%† | – |
Show all 121 benchmarks
| Metric | Publisher | GPT-5.6 Terra (max) | Kimi K3.1 Pro Together (max) |
|---|---|---|---|
| Coding | |||
| LiveBench 1.0 Coding | LiveBench | 78.3% | – |
| LiveCodeBench | Vals AI | 85.9%† | – |
| IOI | Vals AI | 87.6% | – |
| SWE-bench (Vals) | Vals AI | 95.4% | – |
| Code Migration | Vals AI | 47.8% | – |
| ProgramBench | Vals AI | 0.5% | – |
| Vibe Code Bench 1-100 | Vals AI | 14.8% | – |
| Vibe Code Bench v1.1 | Vals AI | 74.6% | – |
| Surface Evolver Bench | Epoch AI Benchmarking Hub | 83.8%† | – |
| DeepSWE v1.1 | Epoch AI Benchmarking Hub | 69.6% | – |
| CursorBench | Cursor | 41.3% | – |
| ALE-Bench | Epoch AI Benchmarking Hub | 1951.4 | – |
| Terminal-Bench 4.0 (AA) | Artificial Analysis | 35.4% | – |
| Terminal-Bench 2.1 (AA) | Artificial Analysis | 88.0% | – |
| Startrise Frontend | Startrise | 66.9%† | – |
| GameBench 2 Overall | DuelLab GameBench 2 | 45.4† | – |
| GameBench 2 by reasoning setting | DuelLab GameBench 2 | 53.0† | – |
| Design Arena Website | Design Arena | 1264† | – |
| FrontierCode 2.0 (AA) | Artificial Analysis | 23.9% | – |
| Agents & tools | |||
| Terminal-Bench | Terminal-Bench | 21.5% | – |
| APEX-Agents | Mercor | 58.2% | – |
| Arena Agent | Arena (LMArena) | -1.9† | – |
| LiveBench Long Agentic | LiveBench | 25.9%† | – |
| LiveBench Browser | LiveBench | 70.3%† | – |
| LiveBench Agentic Coding | LiveBench | 55.0% | – |
| Terminal-Bench Hard | Artificial Analysis | 57.6% | – |
| τ²-Bench Telecom (AA) | Artificial Analysis | 86.3% | – |
| Terminal-Bench 2.1 (Vals) | Vals AI | 77.5% | – |
| GDPval-AA v2.1, normalised score | Artificial Analysis | 47.6% | – |
| τ³-Banking (AA) | Artificial Analysis | 40.2% | – |
| ITBench SRE (AA) | Artificial Analysis | 51.0% | – |
| APEX-Agents (AA) | Artificial Analysis | 38.9% | – |
| CyberBench | Vals AI | 72.1% | – |
| Finance Agent v2 | Vals AI | 54.4% | – |
| Harvey's Legal Agent Benchmark v1 | Vals AI | 0.8% | – |
| Legal Research Bench | Vals AI | 41.4% | – |
| SkillsBench | Vals AI | 58.9% | – |
| SREBench | Vals AI | 9.5% | – |
| Tax Agent Bench | Vals AI | 30.0% | – |
| Terminal-Bench 4.0 (Vals) | Vals AI | 22.7% | – |
| Terminal-Bench Science | Vals AI | 10.0% | – |
| BALROG | BALROG | 53.2% | – |
| Vending-Bench 2 | Andon Labs | 7343.2† | – |
| AutomationBench | Artificial Analysis | 59.6% | – |
| GDP.pdf (AA) | Artificial Analysis | 24.0% | – |
| EnterpriseOps-Gym | Artificial Analysis | 38.5% | – |
| Design Arena Agentic | Design Arena | 1086† | – |
| Terminal-Bench-Science 0.1 (AA) | Artificial Analysis | 13.8% | – |
| Maths | |||
| FrontierMath Tiers 1–3 | Epoch AI Benchmarking Hub | 86.0% | 78.3% |
| FrontierMath Tier 4 | Epoch AI Benchmarking Hub | 70.7% | 65.8% |
| OTIS Mock AIME | Epoch AI Benchmarking Hub | 99.7% | 100.0% |
| ProofBench | Vals AI | 74.0%† | – |
| LiveBench Mathematics | LiveBench | 94.9% | – |
| Arena Maths | Arena (LMArena) | 1479† | – |
| Knowledge | |||
| SimpleQA Verified | Epoch AI Benchmarking Hub | 43.2% | 62.2% |
| LiveBench 2.0 Data Analysis | LiveBench | 79.3%† | – |
| LiveBench Research | LiveBench | 79.7%† | – |
| LiveBench 1.0 Data Analysis | LiveBench | 79.3% | – |
| AA-Omniscience v1.1 | Artificial Analysis | -9.3 | – |
| MMLU-Pro | Vals AI | 86.7%† | – |
| LegalBench | Vals AI | 85.1% | – |
| CorpFin | Vals AI | 65.3%† | – |
| TaxEval | Vals AI | 76.2%† | – |
| Excel Modeling Benchmark | Vals AI | 66.2% | – |
| MedCode | Vals AI | 43.4%† | – |
| MedScribe | Vals AI | 82.9%† | – |
| Public Benefits Bench v1.1 | Vals AI | 62.4% | – |
| GDP.pdf | Epoch AI Benchmarking Hub | 24.7%† | – |
| AA-Omniscience v1.1: accuracy | Artificial Analysis | 42.3% | – |
| AA-Omniscience v1.1: non-hallucination | Artificial Analysis | 10.6% | – |
| Instruction following | |||
| LiveBench Language | LiveBench | 82.9% | – |
| LiveBench Instruction Following | LiveBench | 64.6% | – |
| IFBench | Artificial Analysis | 71.2% | – |
| Arena Instruction Following | Arena (LMArena) | 1463† | – |
| Human preference | |||
| Arena Text | Arena (LMArena) | 1468† | – |
| EQ-Bench 4 | EQ-Bench | 1220† | – |
| Arena Creative Writing | Arena (LMArena) | 1431† | – |
| Arena Multi-turn | Arena (LMArena) | 1475† | – |
| Arena Longer Queries | Arena (LMArena) | 1469† | – |
| Multimodal | |||
| Arena Vision | Arena (LMArena) | 1269† | – |
| LiveBench Design | LiveBench | 70.9%† | – |
| MMMU-Pro | Artificial Analysis | 80.7% | – |
| MMMU-Pro (Vals) | Vals AI | 86.5% | – |
| MortgageTax | Vals AI | 67.3%† | – |
| SAGE | Vals AI | 87.0% | – |
| Blueprint-Bench 2 | Epoch AI Benchmarking Hub | 30.8%† | – |
| Long context | |||
| AA-LCR v1.1 | Artificial Analysis | 83.0% | – |
| Arena Document | Arena (LMArena) | 1474† | – |
| MLCR | Artificial Analysis | 27.2% | – |
| Composite | |||
| Epoch Capabilities Index | Epoch AI Benchmarking Hub | 160.9† | – |
| LiveBench 2.0 | LiveBench | 67.2%† | – |
| LiveBench 1.0 | LiveBench | 77.9% | – |
| AA Intelligence Index v5.0 | Artificial Analysis | 32.3 | – |
| AA Intelligence Index v4.3.2 | Artificial Analysis | 42.1 | – |
| AA Progress Index v1 | Artificial Analysis | 323.9 | – |
| Vals Multimodal Index | Vals AI | 65.1%† | – |
Data as of 2026-11-09. Best configuration of each model; every score links to its source on the model pages.
DuelLab GameBench 2, release gb2-20261103-eaea31df94e6 (https://benchmarks.duellab.org/releases/gb2-20261103-eaea31df94e6/), CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Scores mapped to BenchLeader model names; not endorsed by DuelLab.
What changed
- Kimi K3.1 Pro Together (max): first results.
- GPT-5.6 Terra (max): BenchLeader Index 61.2 → 60.6.
- GPT-5.6 Terra (max): 3 new results (AA Intelligence Index v5.0, CritPt v2 hard subset (AA), FrontierCode 2.0 (AA)).
- GPT-5.6 Terra (max): 1 new result (MirrorCode).
- GPT-5.6 Terra (max): BenchLeader Index 62.5 → 61.2.
- GPT-5.6 Terra (max): 2 new results (AA Progress Index v1, HLE-Diamond (AA)); 4 score revisions.
- GPT-5.6 Terra (max): 1 new result (Harvey's Legal Agent Benchmark v1).
- GPT-5.6 Terra (max): 1 score revision.
- GPT-5.6 Terra (max): 5 new results (AutomationBench, GDP.pdf (AA), MLCR…).
- GPT-5.6 Terra (max): 1 new result (SREBench); 1 score revision.
Related comparisons
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- GPT-5.6 Terra vs Gemini 4 Carbon
- Kimi K3.1 Pro Together vs Claude Fable 5.2
- Kimi K3.1 Pro Together vs Claude Opus 5.5
- Kimi K3.1 Pro Together vs Gemini 4 Carbon
- Kimi K3.1 Pro Together vs GPT-6 Astra
- GPT-5.5 vs Kimi K3.1 Pro Together
Rankings: Best LLM overall · Best LLM for agents · Best cheap LLMs
GPT-5.6 Terra vs Kimi K3.1 Pro Together: questions
- Is GPT-5.6 Terra better than Kimi K3.1 Pro Together?
- GPT-5.6 Terra (max) and Kimi K3.1 Pro Together (max) are neck and neck on quality (60.5 vs 60.5, within the ±5.1 margin). The BenchLeader Index combines every independent quality benchmark; the two are within the margin of error as of 9 Nov 2026, so check the category scores for your use.
- Do independent benchmarks agree on GPT-5.6 Terra vs Kimi K3.1 Pro Together?
- Across the 7 benchmarks both have, GPT-5.6 Terra leads 3, Kimi K3.1 Pro Together leads 4.
- When was Kimi K3.1 Pro Together released?
- Kimi K3.1 Pro Together was released on 23 Oct 2026.