Kimi K2.5 vs Claude Opus 4.5

Side-by-side comparison of specifications, capabilities, and pricing.

	Kimi K2.5 Moonshot AI	Claude Opus 4.5 Anthropic
Released	2026-03-15	2025-11-01
Context window	256K	200K
Parameters	1T (MoE, 384 experts)	—
Architecture	mixture of experts	decoder only
License	MIT	Proprietary
Knowledge cutoff	—	2025-12
Capabilities
Vision
Multimodal
Reasoning
Function calling
Tool use
Structured Outputs
Code execution
Availability
Providers	Fireworks AI OpenRouter Together AI Fireworks AI NVIDIA NIM AWS Bedrock Replicate API	Microsoft Foundry Anthropic GCP Vertex AI AWS Bedrock OpenRouter

Benchmarks

Google-Proof Q&A87.9—MMLU PRO87.188.9Massive Multi-discipline Multimodal Understanding84.380.7Instruction-Following Evaluation93.9—BFCL68.377.5SWE-bench Pro—41.8

Full Kimi K2.5 specs →Full Claude Opus 4.5 specs →