Noometry

Model comparison

Claude Sonnet 4.5 vs Kimi K2.7 Code

Claude Sonnet 4.5 and Kimi K2.7 Code score almost the same on the Noometry Index (44.1 vs 43.3), so choose on price, context window or the category you care about most.

Last verified . 14 shared benchmarks.

Claude Sonnet 4.5 Anthropic

44.1

Rank #81 Confirmed

Kimi K2.7 Code Moonshot AI

43.3

Rank #94 Confirmed

Summary

  • They share 14 benchmarks with published results for both. Claude Sonnet 4.5 scores higher in 2 categories and Kimi K2.7 Code in 3 categories; 5 gaps are clear of the uncertainty.
  • The widest gap is in math, where Kimi K2.7 Code leads 52.9 to 32.3.
  • The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 23.9% for Claude Sonnet 4.5 and 54% for Kimi K2.7 Code.
  • Kimi K2.7 Code is cheaper at $0.95 / $4 per million input/output tokens, against $3 / $15 for Claude Sonnet 4.5.
  • Kimi K2.7 Code accepts more context: 262K tokens versus 200K.
  • Kimi K2.7 Code has downloadable open weights; the other is API-only.

Side by side

Claude Sonnet 4.5Kimi K2.7 Code
ProviderAnthropicMoonshot AI
Noometry Index44.143.3
Released2025-09-292026-06-12
WeightsProprietaryOpen
Context window200K262K
Max output64K262K
Input $ / M tokens$3$0.95
Output $ / M tokens$15$4
Results tracked7319

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Category by category

Coding Claude Sonnet 4.5 leads

Claude Sonnet 4.5: 47.3 (#61), Kimi K2.7 Code: 42.9 (#95)

BenchmarkClaude Sonnet 4.5Kimi K2.7 Code
LMArena WebDev13931473
SciCode44.7%47.5%
WeirdML47.7%54.1%
ALE-Bench796.15886.23
SWE-bench Verified71.3%—
DeepSWE—30.5%
FrontierCode—30.1%
SWE-bench Verified (bash only)71.4%—
SWE-bench Multilingual67%—
GSO14.7%—
LMArena Coding1489—
AlgoTune1.52—

Agentic & Tool Use Claude Sonnet 4.5 leads

Claude Sonnet 4.5: 38.3 (#32), Kimi K2.7 Code: 24.0 (#122)

BenchmarkClaude Sonnet 4.5Kimi K2.7 Code
Vending-Bench 23,8395,083
Terminal-Bench46.5%—
APEX-Agents—37.6%
Berkeley Function Calling Leaderboard73.2%—
GDPval42.5%—
Remote Labor Index2.1%—
τ²-bench Airline72%—
τ²-bench Banking25.3%—
τ²-bench Retail72.4%—
τ²-bench Telecom84.9%—
Cybench60%—
DeepResearch Bench52.6%—
OSWorld62.9%—
GBAEval—0.9%
LMArena Search1159—
METR Time Horizons67.4%—

Reasoning Kimi K2.7 Code leads

Claude Sonnet 4.5: 26.9 (#125), Kimi K2.7 Code: 39.0 (#61)

BenchmarkClaude Sonnet 4.5Kimi K2.7 Code
SimpleBench54.3%57.9%
CritPt1.1%10%
Chess Puzzles12%21%
Epoch Capabilities Index146.84149.97
ARC-AGI-213.6%—
Kagi LLM Benchmark57.9%—
NYT Connections (extended)37.3%—
ARC-AGI-163.7%—
EnigmaEval6%—
EBR-Bench2.4%—
LMArena Hard Prompts1462—
Mystery Game Puzzles17%—
DTBench83.2%—
LMCA38.8%—
Surface Evolver Bench—48.8%
ForecastBench61.9—

Math Kimi K2.7 Code leads

Claude Sonnet 4.5: 32.3 (#216), Kimi K2.7 Code: 52.9 (#48)

BenchmarkClaude Sonnet 4.5Kimi K2.7 Code
FrontierMath (Tiers 1-3)23.9%54%
FrontierMath Tier 42.4%12.2%
OTIS Mock AIME 2024-202577.8%95.6%
ProofBench19%—
Omni-MATH55.3%—
LMArena Math1449—
MATH Level 597.7%—
FrontierMath (Feb 2025 set)15.2%—
FrontierMath Tier 4 (v1)4.2%—

Knowledge Kimi K2.7 Code leads

Claude Sonnet 4.5: 48.4 (#76), Kimi K2.7 Code: 53.5 (#57)

BenchmarkClaude Sonnet 4.5Kimi K2.7 Code
GPQA Diamond82.3%87.9%
SimpleQA Verified30.7%36.5%
Humanity's Last Exam13.7%—
MMLU-Pro86.9%—
Vectara Hallucination Rate12%—
GPQA (HELM)68.6%—
LMArena Expert1482—

Multimodal Not comparable

Claude Sonnet 4.5: 34.8 (#89), Kimi K2.7 Code: —

BenchmarkClaude Sonnet 4.5Kimi K2.7 Code
VPCT39.8%—
LMArena Document1450—

Multilingual Not comparable

Claude Sonnet 4.5: 53.4 (#69), Kimi K2.7 Code: —

BenchmarkClaude Sonnet 4.5Kimi K2.7 Code
LMArena Non-English1425—
LMArena Chinese1459—
LMArena French1458—
LMArena German1427—
LMArena Japanese1390—
LMArena Korean1403—
LMArena Russian1437—
LMArena Spanish1457—

Instruction Following Not comparable

Claude Sonnet 4.5: 75.0 (#78), Kimi K2.7 Code: —

BenchmarkClaude Sonnet 4.5Kimi K2.7 Code
IFEval85%—
LMArena Instruction Following1459—

Long Context Not comparable

Claude Sonnet 4.5: 45.2 (#46), Kimi K2.7 Code: —

BenchmarkClaude Sonnet 4.5Kimi K2.7 Code
LMArena Longer Query1476—

Writing & Preference Not comparable

Claude Sonnet 4.5: 66.5 (#34), Kimi K2.7 Code: —

BenchmarkClaude Sonnet 4.5Kimi K2.7 Code
LMArena Text1439—
LMArena Creative Writing1442—
EQ-Bench Creative Writing1678—
WildBench85.4%—
LMArena Multi-Turn1465—

Frequently asked questions

Is Claude Sonnet 4.5 better than Kimi K2.7 Code?

Claude Sonnet 4.5 and Kimi K2.7 Code score almost the same on the Noometry Index (44.1 vs 43.3), so choose on price, context window or the category you care about most.

Which is cheaper, Claude Sonnet 4.5 or Kimi K2.7 Code?

Kimi K2.7 Code is cheaper. It lists at $0.95 per million input tokens and $4 per million output tokens; Claude Sonnet 4.5 lists at $3 and $15.

Is Claude Sonnet 4.5 or Kimi K2.7 Code better for coding?

Claude Sonnet 4.5 scores higher on coding benchmarks: 47.3 versus 42.9 in the Noometry coding category.

Which has the bigger context window?

Kimi K2.7 Code does, with 262K tokens against 200K.

How many benchmarks do Claude Sonnet 4.5 and Kimi K2.7 Code share?

14 benchmarks have published results for both models. Claude Sonnet 4.5 has 73 scored results on Noometry and Kimi K2.7 Code has 19.

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