LLM Reference

Kimi K2.6 vs o3

Kimi K2.6 (2026) and o3 (2025) compare a coding-specialized model against a standalone API model. Kimi K2.6 ships a 262k-token context window, while o3 ships a 200k-token context window. On SWE-bench Verified, Kimi K2.6 leads by 8.5 pts. On pricing, Kimi K2.6 costs $0.73/1M input tokens versus $2/1M for the alternative. This page treats the result as workflow and deployment fit, not a universal model winner.

Treat this as a product-type comparison: Kimi K2.6 is coding-specialized model, while o3 is standalone API model. Choose based on workflow fit before reading any benchmark or price row as decisive.

Decision scorecard

Local evidence first
SignalKimi K2.6o3
Product typeCoding-specialized modelStandalone API model
Best forcustom coding agents, code generation, and tool loopsreasoning-heavy apps, multimodal apps, and tool-calling agents
Decision fitCoding, RAG, and AgentsCoding, RAG, and Agents
Context window262k200k
Cheapest output$3.49/1M tokens$8/1M tokens
Provider routes9 tracked3 tracked
Shared benchmarksSWE-bench Verified leader7 shared

Decision tradeoffs

Choose Kimi K2.6 when...
  • Kimi K2.6 holds a shared-benchmark lead on SWE-bench Verified, ahead by 8.5 points.
  • Kimi K2.6 has the larger context window for long prompts, retrieval packs, or transcript analysis.
  • Kimi K2.6 has the lower cheapest tracked output price at $3.49/1M tokens.
  • Kimi K2.6 has broader tracked provider coverage for fallback and route flexibility.
  • Local decision data tags Kimi K2.6 for Coding, RAG, and Agents.
Choose o3 when...
  • o3 holds a shared-benchmark lead on HumanEval, ahead by 4.7 points.
  • o3 uniquely exposes Code execution in local model data.
  • Local decision data tags o3 for Coding, RAG, and Agents.

Monthly cost at traffic

Estimate token spend from the cheapest tracked input and output route or tier on this page.

Lower estimate Kimi K2.6

Kimi K2.6

$1,457

Cheapest tracked route/tier: OpenRouter

o3

$3,600

Cheapest tracked route/tier: OpenAI API

Estimated monthly gap: $2,144. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.

Switch friction

Kimi K2.6 -> o3
  • Provider overlap exists on OpenRouter and Vercel AI Gateway; start route-level A/B tests there.
  • o3 is $4.51/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
  • o3 adds Code execution in local capability data.
o3 -> Kimi K2.6
  • Provider overlap exists on OpenRouter and Vercel AI Gateway; start route-level A/B tests there.
  • Kimi K2.6 is $4.51/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
  • Check replacement coverage for Code execution before moving production traffic.

Specs

Specification
Released2026-04-202025-04-16
Context window262k200k
Parameters1T—
ArchitectureMixture of ExpertsDecoder Only
LicenseMITOSI-approvedProprietary
OpennessOpen sourceProprietary
WeightsAvailable·Moonshot Modified MIT LicenseNot released
CodeAvailable·Moonshot Modified MIT LicenseUnknown
Commercial useCommercial use: permittedCommercial use: conditional
Knowledge cutoff2025-042024-06

Pricing and availability

Pricing attributeKimi K2.6o3
Input price$0.73/1M tokens$2/1M tokens
Output price$3.49/1M tokens$8/1M tokens
Providers
Cloudflare Workers AINVIDIA NIMMoonshot AI KimiFireworks AIOpenRouterMicrosoft Foundry
OpenAI APIOpenRouterVercel AI Gateway

Capabilities

CapabilityKimi K2.6o3
VisionYesYes
MultimodalYesYes
ReasoningYesYes
JSON / Tool useYesYes
Structured outputsYesYes
Code executionNoYes
IDE integrationNoNo
Computer useNoNo
Parallel agentsNoNo

Benchmarks

BenchmarkKimi K2.6o3
SWE-bench Verified80.271.7
Google-Proof Q&A90.587.7
LiveCodeBench89.685.5
Humanity's Last Exam34.720.3
HumanEval92.096.7
Chatbot Arena1462.01412.0
MMMU Pro80.176.4

Continue comparing

Model pages
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Last reviewed: 2026-06-30. Data sourced from public model cards and provider documentation.