Model profile
moonshotai

MoonshotAI: Kimi K2 0905

MoonshotAI: Kimi K2 0905 is a budget text-first model from moonshotai with a fast runtime profile, extended context posture, and the clearest fit around long-context research / agent workflows.

Best for: Long-context research / Agent workflowsFast latencyExtended contextBudget pricing
Intelligence
30.9

Benchmark blend

Coding
25.9

Dev workflow signal

Context
131K Tokens

Extended

Input Price
$0.99

Budget tier

Decision snapshot
54

MoonshotAI: Kimi K2 0905 currently reads as a budget text-first option with extended context and a fast runtime profile.

Overall profile
Use-case specific
Best for
Long-context research / Agent workflows
Latency tier
Fast
Price tier
Budget
Source coverage
OpenRouterArtificial Analysis

Decision Strip

Decision rail before the raw tables

Core buy-side signals stay in one pass. The rest of the page expands only after intelligence, speed, context, and price are clear.

Intelligence
30.9
31

General reasoning and benchmark headroom.

Limited
Speed
80 tok/s
76

TTFT 0.52s

Competitive
Context
131K Tokens
76

How much prompt and task state can stay in view.

Competitive
Price
$0.99
86

$2.50 output / 1M

Efficient

Editorial Profile

MoonshotAI: Kimi K2 0905 in one narrative

Positioning, tradeoffs, and fit are consolidated into one read instead of repeating the same story across separate cards.

Use-case specificCoding score 26Math score 57

Kimi K2 0905 is the September update of [Kimi K2 0711](moonshotai/kimi-k2). It is a large-scale Mixture-of-Experts (MoE) language model developed by Moonshot AI, featuring 1 trillion total parameters with 32 billion active per forward pass. It supports long-context inference up to 256k tokens, extended from the previous 128k. This update improves agentic coding with higher accuracy and better generalization across scaffolds, and enhances frontend coding with more aesthetic and functional outputs for web, 3D, and related tasks. Kimi K2 is optimized for agentic capabilities, including advanced tool use, reasoning, and code synthesis. It excels across coding (LiveCodeBench, SWE-bench), reasoning (ZebraLogic, GPQA), and tool-use (Tau2, AceBench) benchmarks. The model is trained with a novel stack incorporating the MuonClip optimizer for stable large-scale MoE training.

Identity

moonshotai text-first profile

Positioning

Long-context research / Agent workflows with extended context and fast runtime.

Cost posture

Efficient spend profile. More comfortable for sustained prompt volume if the capability fit is right.

Strengths
  • Large context headroom supports repo-wide prompts and long research sessions.

  • Latency and throughput look responsive enough for interactive loops.

Tradeoffs
  • Budget-friendly input pricing is a strength, but raw capability may vary by workload.

  • Current metadata points to a text-first profile rather than a broad multimodal one.

Best fit
  • Long-context summarization, repo analysis, and policy or document review.

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Benchmarks

Grouped by job-to-be-done

Only benchmark categories with actual signal are shown. Secondary values stay as simple definitions instead of nested micro-cards.

General intelligence

Broad reasoning, knowledge depth, and flagship benchmark posture.

Intelligence Index
30.9
MMLU Pro
81.9%
GPQA
76.7%
HLE
6.3%
Coding

Software implementation, debugging quality, and coding benchmark signal.

Coding Index
25.9
LiveCodeBench
0.610
SciCode
30.7%
Math

Formal reasoning, structured problem solving, and competition-style math.

Math Index
57.3
AIME 2025
57.3%
Agent / tool use

Long-horizon execution quality and interactive benchmark evidence.

IFBench
41.7%
TAU2
73.4%
TerminalBench Hard
23.5%
LCR
52.3%

Specs & Pricing

Technical snapshot and cost posture

Specs stay neutral, pricing gets emphasis through values rather than extra containers. Raw provider internals remain in metadata at the end.

Technical snapshot
Context Window
131K Tokens
Vision
Text-first
Modalities
text->text, text
Tokenizer
Other
Moderation
No
Supported Parameters
frequency_penaltylogit_biaslogprobsmax_tokensmin_ppresence_penaltyrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p
Input Modalities
text
Output Modalities
text
Price architecture
Input
per 1M input tokens
$0.99
Output
per 1M output tokens
$2.50
Blended
AA 3:1 mix
$1.20

This model is relatively efficient on price. It is the easier fit when sustained prompt volume matters.

OR Cache Read
$0.00

Metadata

Raw source tables at the end

Verification details remain available, but the page no longer forces them ahead of the editorial read.