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GPT-6.1 Terra vs Kimi K3.1 Pro Together

Full profiles: GPT-6.1 Terra (OpenAI) and Kimi K3.1 Pro Together (Moonshot AI): every benchmark, price and rank.

Updated · Data from 8 sources

As of 9 Nov 2026, GPT-6.1 Terra is ahead of Kimi K3.1 Pro Together on quality (65.0 vs 60.5 on the BenchLeader Index). Choose GPT-6.1 Terra for maths (73 vs 66) and reasoning (69 vs 67); choose Kimi K3.1 Pro Together for knowledge (68 vs 62).

Key facts (as of 9 Nov 2026)

  • GPT-6.1 Terra scores 65.0 on the BenchLeader Index and Kimi K3.1 Pro Together scores 60.5 (BenchLeader, 9 Nov 2026).
  • GPT-6.1 Terra costs $2.00 per 1M tokens blended (list price, 9 Nov 2026).
  • Of the 6 benchmarks both models have, GPT-6.1 Terra leads 4 (BenchLeader, 9 Nov 2026).
GPT-6.1 Terra benchmarks max OpenAI Kimi K3.1 Pro Together benchmarks max Moonshot AIAdd a third model

Which 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 casePickWhyConfidence
MathsGPT-6.1 Terra73 vs 66 category score; FrontierMath Tiers 1–3 90.9% vs 78.3%Medium
ReasoningGPT-6.1 Terra69 vs 67 category score; GPQA Diamond 94.3% vs 94.2%Medium
KnowledgeKimi K3.1 Pro Together68 vs 62 category score; SimpleQA Verified 62.2% vs 57.3%Medium
High volume on a budgetNeither flagshipA smaller model is usually the better fit: Cheapest good LLMs, Fastest LLMs–

Key differences

  • GPT-6.1 Terra (max) leads on quality: 65.0 vs 60.5.
  • GPT-6.1 Terra (max) is stronger in agents & tools, coding, long context, maths, multimodal, reasoning.
  • Kimi K3.1 Pro Together (max) is stronger in knowledge.

At a glance

SpecGPT-6.1 TerraKimi K3.1 Pro Together
DeveloperOpenAIMoonshot AI
Released26 Oct 202623 Oct 2026
Context window (tokens)1,050,000–
Compared atGPT-6.1 Terra (max)Kimi K3.1 Pro Together (max)
Open weightsNoNo
Price in / out / cached input per 1M$1.00 / $5.00 / $0.050–

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.

CategoryGPT-6.1 Terra (max)Kimi K3.1 Pro Together (max)Leader
Reasoning68.767.1GPT-6.1 Terra
Coding69.8–not comparable
Agents & tools69.7–not comparable
Maths72.565.8GPT-6.1 Terra
Knowledge62.367.6Kimi K3.1 Pro Together
Multimodal67.2–not comparable
Long context66.1–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.

2550 avg75ReasoningMathsKnowledgeGPT-6.1 Terra, Reasoning: 68.7GPT-6.1 Terra, Maths: 72.5GPT-6.1 Terra, Knowledge: 62.3Kimi K3.1 Pro Together, Reasoning: 67.1Kimi K3.1 Pro Together, Maths: 65.8Kimi K3.1 Pro Together, Knowledge: 67.6

Not drawn, measured for fewer than two of these models: Coding, Agents & tools, Instruction following, Long context, Multimodal, Human preference.

ModelIndex

Where sources disagree

Across the 6 benchmarks both have, GPT-6.1 Terra leads 4, Kimi K3.1 Pro Together leads 1 and 1 is a tie. Every overall index that rates both puts GPT-6.1 Terra ahead.

Overall indexGPT-6.1 Terra (max)Kimi K3.1 Pro Together (max)Leader
BenchLeader Index65.060.5GPT-6.1 Terra

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.

MeasureGPT-6.1 Terra (max)Kimi K3.1 Pro Together (max)
Blended price per 1M tokens$2.00–
Input / output per 1M$1.00 / $5.00– / –
Cached input per 1M$0.050–
Price per task: chat reply$0.0019–
Price per task: summarize a 30-page report$0.015–
Price per task: code edit$0.013–
Price per task: agentic coding session$0.080–
Price per task: structured extraction$0.0030–
Agentic coding session, input mostly cached$0.037–
Cost per benchmark task (AA Index)$0.961–
Output tokens per task (AA Index)60k–
Of which reasoning39k–
Time per task (AA Index)14 min–
Output speed73 tok/s–
Time to first answer151.6 s–
Time to a complete answer321.6 s–

Each model is compared at its best-ranked reasoning-effort setting. GPT-6.1 Terra (max) scores 65.0 and takes 152 s to its first answer token; GPT-6.1 Terra (xhigh) scores 60.1 in 29 s, GPT-6.1 Terra (high) scores 59.7 in 10 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

61 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.

MetricPublisherGPT-6.1 Terra (max)Kimi K3.1 Pro Together (max)
BenchLeader IndexBenchLeader65.060.5
Agents & tools scoreBenchLeader69.7–
Coding scoreBenchLeader69.8–
Knowledge scoreBenchLeader62.367.6
Long context scoreBenchLeader66.1–
Maths scoreBenchLeader72.565.8
Multimodal scoreBenchLeader67.2–
Reasoning scoreBenchLeader68.767.1
Blended price $/MBenchLeader$2.00–
Output speedBenchLeader73 tok/s–
Time to first answerBenchLeader151.6 s–
Context windowBenchLeader1,050,000 tokens–
Reasoning
GPQA DiamondEpoch AI Benchmarking Hub94.3%94.2%
LiveBench 2.0 ReasoningLiveBench88.7%†–
Humanity's Last Exam (AA)Artificial Analysis46.3%–
HLE-Diamond (AA)Artificial Analysis47.3%–
CritPtArtificial Analysis28.0%–
CritPt v2 hard subset (AA)Artificial Analysis68.0%–
Chess PuzzlesEpoch AI Benchmarking Hub–45.0%
Mystery Game PuzzlesEpoch AI Benchmarking Hub74.0%42.0%
Coding
SciCodeSciCode55.1%–
Arena WebDevArena (LMArena)1678–
LiveBench 2.0 CodingLiveBench89.2%†–
Vibe Code Bench v1.1Vals AI84.0%–
ALE-BenchEpoch AI Benchmarking Hub2608.8–
Terminal-Bench 4.0 (AA)Artificial Analysis55.6%–
Startrise FrontendStartrise82.0%†–
Design Arena WebsiteDesign Arena1288†–
FrontierCode 1.1 (AA)Artificial Analysis36.0%–
FrontierCode 2.0 (AA)Artificial Analysis42.3%–
Agents & tools
APEX-AgentsMercor68.3%–
Arena AgentArena (LMArena)12.1–
LiveBench Long AgenticLiveBench56.2%†–
LiveBench BrowserLiveBench93.1%†–
HiL-BenchScale AI SEAL68.0%†–
GDPval-AA v2.1Artificial Analysis1476–
Finance Agent v2.1Vals AI56.0%–
Show all 61 benchmarks
MetricPublisherGPT-6.1 Terra (max)Kimi K3.1 Pro Together (max)
Agents & tools
Harvey's Legal Agent Benchmark v1.1Vals AI1.7%–
Legal Research BenchVals AI26.0%–
Tax Agent BenchVals AI17.1%–
Terminal-Bench 4.0 (Vals)Vals AI49.5%–
Vending-Bench 2Andon Labs9107.5†–
AutomationBenchArtificial Analysis60.2%–
GDP.pdf (AA)Artificial Analysis28.6%–
AA-Briefcase v1.1Artificial Analysis1401–
GDPxGDPx by SemiAnalysis8.5%–
Design Arena AgenticDesign Arena1190†–
Terminal-Bench-Science 0.1 (AA)Artificial Analysis57.6%–
Maths
FrontierMath Tiers 1–3Epoch AI Benchmarking Hub90.9%78.3%
FrontierMath Tier 4Epoch AI Benchmarking Hub92.7%65.8%
OTIS Mock AIMEEpoch AI Benchmarking Hub100.0%100.0%
Knowledge
SimpleQA VerifiedEpoch AI Benchmarking Hub57.3%62.2%
LiveBench 2.0 Data AnalysisLiveBench82.3%†–
LiveBench ResearchLiveBench79.1%†–
AA-Omniscience v1.1Artificial Analysis29.6–
Excel Modeling Benchmark v1.1Vals AI73.3%–
EBR-benchEpoch AI Benchmarking Hub78.1%–
AA-Omniscience v1.1: accuracyArtificial Analysis47.6%–
AA-Omniscience v1.1: non-hallucinationArtificial Analysis65.5%–
Instruction following
MultiChallengeScale AI SEAL74.2%†–
Multimodal
LiveBench DesignLiveBench79.7%†–
MMMU-ProArtificial Analysis84.7%–
Blueprint-Bench 2Epoch AI Benchmarking Hub42.1%†–
Long context
AA-LCR v1.1Artificial Analysis82.7%–
MLCRArtificial Analysis30.6%–
Composite
Epoch Capabilities IndexEpoch AI Benchmarking Hub167.8†–
LiveBench 2.0LiveBench78.8%†–
AA Intelligence Index v5.0Artificial Analysis51.3–
AA Intelligence Index v4.3.2Artificial Analysis48.1–
AA Progress Index v1Artificial Analysis345.2–
Vals IndexVals AI60.5–
Vals Finance IndexVals AI53.3%–
Safety & honesty
FORTRESSScale AI SEAL18.2%†–

Data as of 2026-11-09. Best configuration of each model; every score links to its source on the model pages.

What changed

  • GPT-6.1 Terra (max): 1 score revision.
  • GPT-6.1 Terra (max): 1 score revision.
  • Kimi K3.1 Pro Together (max): first results.
  • GPT-6.1 Terra (max): 1 score revision.
  • GPT-6.1 Terra (max): 1 score revision.
  • GPT-6.1 Terra (max): 1 score revision.
  • GPT-6.1 Terra (max): BenchLeader Index 64.7 → 65.2.
  • GPT-6.1 Terra (max): 1 new result (Arena Agent).
  • GPT-6.1 Terra (max): 3 new results (SciCode, APEX-Agents, ALE-Bench).
  • GPT-6.1 Terra (max): BenchLeader Index 63.5 → 64.7.

Rankings: Best LLM overall · Best LLM for coding · Best LLM for agents · Best cheap LLMs

GPT-6.1 Terra vs Kimi K3.1 Pro Together: questions

Is GPT-6.1 Terra better than Kimi K3.1 Pro Together?
GPT-6.1 Terra (max) leads on quality: 65.0 vs 60.5. The BenchLeader Index combines every independent quality benchmark; GPT-6.1 Terra (max) is ahead overall as of 9 Nov 2026, but check the category scores for your use.
Do independent benchmarks agree on GPT-6.1 Terra vs Kimi K3.1 Pro Together?
Across the 6 benchmarks both have, GPT-6.1 Terra leads 4, Kimi K3.1 Pro Together leads 1 and 1 is a tie. Every overall index that rates both puts GPT-6.1 Terra ahead.
When was GPT-6.1 Terra released?
GPT-6.1 Terra was released on 26 Oct 2026.