Claude Opus 4.5 vs Kimi K2.5

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

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

Benchmarks

Massive Multi-discipline Multimodal Understanding80.784.3BFCL77.568.3SWE-bench Pro41.8—MMLU PRO88.987.1Google-Proof Q&A—87.9Instruction-Following Evaluation—93.9

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