MoonshotAIReleased on Oct 23, 2026Kimi K3.1 Pro: Benchmarks, Pricing & Context Window
Kimi K3.1 Pro is a language model from MoonshotAI, released in October 2026, with multimodal input, a 1.0M-token context window, and pricing from $2.00/M input, $0.200/M cached input, $10.00/M output.
Kimi K3.1 Pro is the first model in Moonshot AI's K3.1 series, a post-trained version of Kimi K3 built with substantially larger post-training compute and large-scale joint reinforcement learning across hundreds of domains. Moonshot
Kimi K3.1 Pro benchmarks
Capability tiers
Standing within each category, adjusted for leaderboard depth.
Real tasks performance
High-confidence performance for Kimi K3.1 Pro across real-world prompt categories. Only 95% intervals at most 4 points wide are shown.
Performance by conversation depth
How Kimi K3.1 Pro holds up as conversations get longer.
Quality Tracker
Kimi K3.1 Pro Performance Across Datasets
Scores sourced from the model's scorecard, paper, or official blog posts
llm-stats.com - Thu Oct 29 2026Kimi K3.1 Pro pricing
Providers
Kimi K3.1 Pro starts at $2.00 per million input tokens and $10.00 per million output tokens via Moonshot AI. Reused prompt prefixes cost $0.200 per million cached input tokens.
| Provider | Input $/M | Cached input $/M | Output $/M | Context in / out | TTFT p95 s | Output p5 c/s | Modalities in / out |
|---|---|---|---|---|---|---|---|
 Moonshot AI | $2.00 | $0.200 | $10.00 | 1.0M/1.0M | — | — | / |
Cached input is the discounted price for prompt tokens served from a provider cache. TTFT is time to first token. Output is characters per second; p5 is the sustained floor exceeded by 95% of observed requests.
Kimi K3.1 Pro context window
Input and output token limits for Kimi K3.1 Pro, plus how it ranks on long-context understanding.
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Kimi K3.1 Pro latency
Kimi K3.1 Pro time to first token, sustained output throughput, and failed-request rate from live model usage over the trailing 7 days.
Kimi K3.1 Pro examples
Recent arena outputs from Kimi K3.1 Pro, picked from the highest-ranked matchups.
Kimi K3.1 Pro resources
Official sources for Kimi K3.1 Pro: provider documentation, official playground, official launch post.
Kimi K3.1 Pro vs other models
The most-compared alternatives to Kimi K3.1 Pro are Claude Mythos Preview, Grok-4 Heavy, GPT-6 Astra. Open any pair side-by-side for benchmarks, pricing, context, and latency.
Models like Kimi K3.1 Pro
Models ranked just above and below Kimi K3.1 Pro by LLM Stats score.
FAQ
Common questions about Kimi K3.1 Pro.