Claude Opus 4.8 vs Kimi K2.6

Pick two tools from the same category to compare side-by-side.

	Claude Opus 4.8 Anthropic's Opus-tier model (May 2026) with improved coding, agentic, and honesty behavior over Opus 4.7.	Kimi K2.6 Moonshot AI's flagship 1T-parameter open-weight MoE model with native multimodal input and interleaved-thinking tool use.
Category	model	model
Vendor type	commercial	open source
Pricing	usage	free
Strengths	+ Vendor-reported gains on coding and agentic benchmarks (Terminal-Bench 2.1, 84% on Online-Mind2Web) + Improved honesty; more likely to acknowledge missing information and flag flaws in its own code + Standard pricing unchanged from Opus 4.7 ($5 input / $25 output per million tokens), with a cheaper fast mode than before	+ Interleaved thinking with multi-step tool calling for agent workflows + 256K-token context window + Multimodal (image and video) input via built-in vision encoder + OpenAI/Anthropic-compatible first-party API eases drop-in adoption
Tradeoffs	− Superseded as Anthropic's top model by Claude Fable 5 (June 2026) for the most demanding long-horizon work − API-only commercial model; no open weights	− Modified MIT license (not plain MIT/Apache) requires review for some uses − Video chat is experimental and only available through the official API − 1T-parameter scale limits self-hosting to large deployments
Used in stacks	0	0