Claude Fable 5$22.000/MClaude Opus 4.8$11.000/MClaude Opus 4.7$11.000/MClaude Opus 4.6$11.000/MClaude Opus 4.5$33.000/MClaude Sonnet 3.7$6.600/MClaude Opus 3$33.000/MClaude 2.1$12.800/MClaude 2$12.800/MGPT-5.5$12.500/MGPT-5.2$5.425/MGPT-5.2-Codex$5.425/MGPT-5$3.875/MGPT-4.5$97.500/MGPT-4 Turbo Preview$16.000/MGPT-4$39.000/MGPT-4-32k$78.000/Mo3$19.000/Mo3-mini$2.090/Mo4-mini$2.090/Mo1$28.500/Mo1-mini$5.700/Mo1-preview$28.500/MGemini 3.5 Pro$5.000/MGemini 3.1 Pro$5.000/MGemini 3 Pro$5.000/MGemini 2.5 Pro$3.875/MGemini 1.5 Pro$2.375/MGemini 1.0 Ultra$12.000/MGemini 1.0 Pro$0.800/MClaude Fable 5$22.000/MClaude Opus 4.8$11.000/MClaude Opus 4.7$11.000/MClaude Opus 4.6$11.000/MClaude Opus 4.5$33.000/MClaude Sonnet 3.7$6.600/MClaude Opus 3$33.000/MClaude 2.1$12.800/MClaude 2$12.800/MGPT-5.5$12.500/MGPT-5.2$5.425/MGPT-5.2-Codex$5.425/MGPT-5$3.875/MGPT-4.5$97.500/MGPT-4 Turbo Preview$16.000/MGPT-4$39.000/MGPT-4-32k$78.000/Mo3$19.000/Mo3-mini$2.090/Mo4-mini$2.090/Mo1$28.500/Mo1-mini$5.700/Mo1-preview$28.500/MGemini 3.5 Pro$5.000/MGemini 3.1 Pro$5.000/MGemini 3 Pro$5.000/MGemini 2.5 Pro$3.875/MGemini 1.5 Pro$2.375/MGemini 1.0 Ultra$12.000/MGemini 1.0 Pro$0.800/M
BETA
Subscribe
← Back to Index·All Moonshot AI models
Moonshot AI
Moonshot AIReasoning

Kimi k1.5

Reasoning

Moonshot's reasoning Kimi. RL-trained chain-of-thought competitive with o1 on math benchmarks; long-context strength is the Kimi signature.

Kimi k1.5 is a reasoning AI model from Moonshot AI. It costs $2.500 per million input tokens and $10.000 per million output tokens (blended $4.750/M), with a 128K-token context window.

Released Jan 2025Modalities textOfficial model page ↗Compare with another model →Estimate monthly cost →
INPUT
$2.500/M
per million input tokens
OUTPUT
$10.000/M
per million output tokens
BLENDED 70/30
$4.750/M
default reference rate · how it's calculated →
CONTEXT
128K
128,000 tokens
What it's good at
  • Reasoning + long context
  • Strong math
  • Visible thinking
  • Aggressive Chinese pricing
Typical use cases
  • Reasoning agents
  • Long-document STEM analysis
Benchmarks
vs. best public score
MMLU88%
Multitask academic knowledge across 57 subjects.
GPQA Diamond70%
Graduate-level science questions, "Google-proof".
MATH96%
High-school competition math problems.
HumanEval92%
Python function synthesis from docstrings.
Hand-curated from each provider's published reports and public leaderboards. Methodology varies across sources — treat as directional rather than authoritative.
More from Moonshot AI
See all 4 →
Moonshot v1 128k
Long Context · 128K ctx
in $1.800/Mout $1.800/M
Moonshot v1 32k
Balanced · 32K ctx
in $0.400/Mout $0.400/M
Moonshot v1 8k
Compact · 8K ctx
in $0.120/Mout $0.120/M
Frequently asked questions

How much does Kimi k1.5 cost?

Kimi k1.5 costs $2.500 per million input tokens and $10.000 per million output tokens, for a blended reference rate of $4.750 per million tokens.

What is Kimi k1.5's context window?

Kimi k1.5 supports up to 128K tokens of context (128,000 tokens).

What is Kimi k1.5 best for?

Kimi k1.5 is well suited to Reasoning + long context, Strong math and Visible thinking.

Who makes Kimi k1.5?

Kimi k1.5 is developed and served by Moonshot AI. It was released in Jan 2025.