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GPT-5.4 Pro vs Kimi K3.1 Pro Together

Full profiles: GPT-5.4 Pro (OpenAI) and Kimi K3.1 Pro Together (Moonshot AI): every benchmark, price and rank.

Updated · Data from 4 sources

As of 9 Nov 2026, GPT-5.4 Pro and Kimi K3.1 Pro Together are neck and neck on quality (63.3 vs 60.5 on the BenchLeader Index, inside the ±4.3 margin). GPT-5.4 Pro leads in every category we measure both in.

Key facts (as of 9 Nov 2026)

  • GPT-5.4 Pro scores 63.3 on the BenchLeader Index and Kimi K3.1 Pro Together scores 60.5 (BenchLeader, 9 Nov 2026).
  • GPT-5.4 Pro costs $67.50 per 1M tokens blended (list price, 9 Nov 2026).
GPT-5.4 Pro benchmarks 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
ReasoningGPT-5.4 Pro73 vs 67 category scoreMedium
KnowledgeGPT-5.4 Pro74 vs 68 category scoreMedium
High volume on a budgetNeither flagshipA smaller model is usually the better fit: Cheapest good LLMs, Fastest LLMs–

Key differences

  • GPT-5.4 Pro and Kimi K3.1 Pro Together (max) are neck and neck on quality (63.3 vs 60.5, within the ±4.3 margin).
  • GPT-5.4 Pro is stronger in instruction following, knowledge, multimodal, reasoning.
  • Kimi K3.1 Pro Together (max) is stronger in maths.

At a glance

SpecGPT-5.4 ProKimi K3.1 Pro Together
DeveloperOpenAIMoonshot AI
Released4 Mar 202623 Oct 2026
Context window (tokens)1,050,000–
Compared atGPT-5.4 ProKimi K3.1 Pro Together (max)
Open weightsNoNo
Price in / out / cached input per 1M$30.00 / $180.00 / ––

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-5.4 ProKimi K3.1 Pro Together (max)Leader
Reasoning72.967.1GPT-5.4 Pro
Maths–65.8not comparable
Knowledge74.067.6GPT-5.4 Pro
Instruction following63.1–not comparable
Multimodal69.8–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 avg75ReasoningMathsKnowledgeInstructionfollowingMultimodalGPT-5.4 Pro, Reasoning: 72.9GPT-5.4 Pro, Knowledge: 74.0GPT-5.4 Pro, Instruction following: 63.1GPT-5.4 Pro, Multimodal: 69.8Kimi K3.1 Pro Together, Reasoning: 67.1Kimi K3.1 Pro Together, Maths: 65.8Kimi K3.1 Pro Together, Knowledge: 67.6

Dashed: that model has no result on the axis it crosses; the line only joins its neighbours.

Not drawn, no result for these models: Coding, Agents & tools, Long context, Human preference.

ModelIndex

Where sources disagree

Across the 0 benchmarks both have, GPT-5.4 Pro leads 0, Kimi K3.1 Pro Together leads 0.

Overall indexGPT-5.4 ProKimi K3.1 Pro Together (max)Leader
BenchLeader Index63.360.5neck 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.

MeasureGPT-5.4 ProKimi K3.1 Pro Together (max)
Blended price per 1M tokens$67.50–
Input / output per 1M$30.00 / $180.00– / –
Price per task: chat reply$0.066–
Price per task: summarize a 30-page report$0.468–
Price per task: code edit$0.450–
Price per task: agentic coding session$2.52–
Price per task: structured extraction$0.096–
Output speed6 tok/s–
Time to first answer8.9 s–

Each model is compared at its best-ranked reasoning-effort setting. GPT-5.4 Pro scores 63.3 and takes 9 s to its first answer token; GPT-5.4 Pro (xhigh) scores 59.9 in 9 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

21 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-5.4 ProKimi K3.1 Pro Together (max)
BenchLeader IndexBenchLeader63.360.5
Instruction following scoreBenchLeader63.1–
Knowledge scoreBenchLeader74.067.6
Multimodal scoreBenchLeader69.8–
Reasoning scoreBenchLeader72.967.1
Maths scoreBenchLeader–65.8
Blended price $/MBenchLeader$67.50–
Output speedBenchLeader6 tok/s–
Time to first answerBenchLeader8.9 s–
Context windowBenchLeader1,050,000 tokens–
Reasoning
GPQA DiamondEpoch AI Benchmarking Hub94.6%†94.2%
Humanity's Last ExamScale AI / CAIS44.3%–
SimpleBenchSimpleBench74.1%–
ARC-AGI-1ARC Prize94.5%†–
ARC-AGI-2ARC Prize83.3%†–
CritPtArtificial Analysis30.0%†–
Chess PuzzlesEpoch AI Benchmarking Hub59.0%†45.0%
Mystery Game PuzzlesEpoch AI Benchmarking Hub–42.0%
Coding
WeirdMLWeirdML57.4%†–
Maths
FrontierMath Tiers 1–3Epoch AI Benchmarking Hub82.5%†78.3%
FrontierMath Tier 4Epoch AI Benchmarking Hub58.5%†65.8%
OTIS Mock AIMEEpoch AI Benchmarking Hub–100.0%
MathArena ApexMathArena69.8%†–
Knowledge
SimpleQA VerifiedEpoch AI Benchmarking Hub46.3%†62.2%
MultiNRCScale AI SEAL62.3%–
Instruction following
MultiChallengeScale AI SEAL69.2%–
TutorBenchScale AI SEAL56.6%–
Multimodal
VISTAScale AI SEAL53.9%–
Composite
Epoch Capabilities IndexEpoch AI Benchmarking Hub160.2–
Safety & honesty
FORTRESSScale AI SEAL14.8%–
MASKScale AI SEAL91.7%–

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

What changed

  • Kimi K3.1 Pro Together (max): first results.
  • GPT-5.4 Pro: BenchLeader Index 63.6 → 63.1.
  • GPT-5.4 Pro: 1 score revision.
  • GPT-5.4 Pro: BenchLeader Index 62.1 → 63.6.
  • GPT-5.4 Pro: 1 new result (MultiNRC).
  • GPT-5.4 Pro: BenchLeader Index 64.0 → 62.1.

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

GPT-5.4 Pro vs Kimi K3.1 Pro Together: questions

Is GPT-5.4 Pro better than Kimi K3.1 Pro Together?
GPT-5.4 Pro and Kimi K3.1 Pro Together (max) are neck and neck on quality (63.3 vs 60.5, within the ±4.3 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.
When was Kimi K3.1 Pro Together released?
Kimi K3.1 Pro Together was released on 23 Oct 2026.