Kimi K3.1 Pro Intelligence, Performance & Price Analysis
Model summary
Kimi K3.1 Pro is amongst the leading models in intelligence and reasonably priced when comparing to other models of similar price. It's also slower than average and very verbose. The model supports text and image input, outputs text, and has a 1M tokens context window.
Kimi K3.1 Pro scores 55 on the Artificial Analysis Intelligence Index, placing it well above average among comparable models (median: 27). When evaluating the Intelligence Index, it generated 150M tokens, which is very verbose in comparison to the median of 87M.
Pricing for Kimi K3.1 Pro is $2.00 per 1M input tokens (moderately priced, median: $2.00) and $10.00 per 1M output tokens (moderately priced, median: $10.00). On average, it costs $2.11 per task to evaluate Kimi K3.1 Pro on the Intelligence Index.
At 73 tokens per second, Kimi K3.1 Pro is slower than average (81).
Reasoning | Yes This page shows the reasoning version of this model. A non-reasoning variant may also exist. |
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Input modality | Supports: text and image |
Output modality | Supports: text |
Context window | 1M ~1500 A4 pages of size 12 Arial font |
Metrics are compared against models of the same class:
- Non-reasoning models → compared only with other non-reasoning models
- Reasoning models → compared across both reasoning and non-reasoning
- Open weights models → compared only with other open weights models of the same size class:
- Tiny: ≤4B parameters
- Small: 4B–40B parameters
- Medium: 40B–150B parameters
- Large: >150B parameters
- Proprietary models → compared across proprietary and open weights models of the same price range, using a blended 3:1 input/output price ratio:
- <$0.15 per 1M tokens
- $0.15–$1 per 1M tokens
- >$1 per 1M tokens
Intelligence
Artificial Analysis Intelligence Index
Artificial Analysis Intelligence Index by Open Weights / Proprietary
Intelligence Index vs. Cost per Task
Measures the performance of models on specific capabilities and industries
Artificial Analysis Finance & Accounting Index
Evaluations
Agentic knowledge work, Elo
Knowledge
1 - hallucination rate
Agentic SaaS workflows
Agentic real-world work tasks, Elo
Reasoning & knowledge
Professional document reasoning, All-pass
Agentic coding & terminal use
Long context reasoning
Coding
Physics reasoning
Agentic scientific research workflows in a terminal
Agentic software engineering in open-source repositories
Quantitative analysis on spreadsheets & documents
Legal agentic work, Hallucination-Gated All-Pass Rate
Agentic business operations
Agentic interactive 3D experiences, Elo
Kubernetes incident root-cause analysis
Medical long context reasoning
Visual reasoning
Rich, varied, well-crafted language
Well-structured, scannable, answer-first
Truthful, acknowledges uncertainty, non-sycophantic
Use of filler and generic language
AA-Briefcase v1.1
AA-Briefcase Elo
AA-Omniscience
AA-Omniscience Index
Intelligence Index Comparisons
Intelligence Index vs. Cost per Task
Token Use
Output Tokens per Intelligence Index Task
Cost
Cost per Intelligence Index Task
Cost to Run Artificial Analysis Intelligence Index
Pricing: Cache Hit, Input, and Output
Context Window
Context Window
Speed
Measured by Output Speed (tokens per second)
Output Speed
Time per Intelligence Index Task
Latency
Measured by Time (seconds) to First Token
Latency: Time To First Answer Token
End-to-End Response Time
Seconds to output 500 tokens, calculated based on time to first token, 'thinking' time for reasoning models, and output speed
End-to-End Response Time
Frequently Asked Questions
Common questions about Kimi K3.1 Pro
Kimi K3.1 Pro was released on October 23, 2026.
Kimi K3.1 Pro was created by Kimi.
Kimi K3.1 Pro scores 55 on the Artificial Analysis Intelligence Index, placing it well above average among other models in a similar price tier (median: 27).
Kimi K3.1 Pro generates output at 73.5 tokens per second (based on Kimi's API), which is below average compared to other models in a similar price tier (median: 81.1 t/s).
Kimi K3.1 Pro has a time to first token (TTFT) of 3.20s (based on Kimi's API), which is better than average compared to other models in a similar price tier (median: 3.62s).
Kimi K3.1 Pro costs $2.00 per 1M input tokens (better than average, median: $2.00) and $10.00 per 1M output tokens (better than average, median: $10.00), based on Kimi's API.
Kimi K3.1 Pro costs $2.00 per 1M input tokens and $10.00 per 1M output tokens (based on Kimi's API). For a blended rate (7:2:1 cache hit/input/output ratio), this is $1.54 per 1M tokens. Pricing may vary by provider. Compare provider pricing
When evaluated on the Intelligence Index, Kimi K3.1 Pro generated 150M output tokens, which is at the higher end compared to other models in a similar price tier (median: 87M).
Yes, Kimi K3.1 Pro is a reasoning model. It uses extended thinking or chain-of-thought reasoning to work through complex problems before providing an answer.
Kimi K3.1 Pro supports text and image input.
Kimi K3.1 Pro supports text output.
Yes, Kimi K3.1 Pro supports image input and can analyze, describe, and answer questions about images.
Yes, Kimi K3.1 Pro is multimodal. It can process text and image input and generate text output.
Kimi K3.1 Pro has a context window of 1.0M tokens. This determines how much text and conversation history the model can process in a single request.
No, Kimi K3.1 Pro is proprietary. The model weights are not publicly available.
Kimi K3.1 Pro has 2.8 trillion parameters.
Kimi K3.1 Pro achieves a score of 55 on the Artificial Analysis Intelligence Index. This composite benchmark evaluates models across reasoning, knowledge, mathematics, and coding.
Yes, Kimi K3.1 Pro is available via API through 1 provider. Compare API providers
Kimi K3.1 Pro is available through 1 API provider. Compare providers