Gemini 2.5 Flash vs Claude Opus 4.5

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

	Gemini 2.5 Flash Google DeepMind	Claude Opus 4.5 Anthropic
Released	2025-06-17	2025-11-01
Context window	1M	200K
Parameters	—	—
Architecture	decoder only	decoder only
License	Proprietary	Proprietary
Knowledge cutoff	2025-01	2025-12
Capabilities
Vision
Multimodal
Reasoning
Function calling
Tool use
Structured Outputs
Code execution
Availability
Providers	Google AI Studio GCP Vertex AI Replicate API OpenRouter	Microsoft Foundry Anthropic GCP Vertex AI AWS Bedrock OpenRouter

Benchmarks

HumanEval90.1—LiveCodeBench76.2—Aider Polyglot55.1—Chatbot Arena1320.0—Massive Multi-discipline Multimodal Understanding79.780.7BFCL56.277.5MMLU PRO80.988.9SWE-bench Pro—41.8

Full Gemini 2.5 Flash specs →Full Claude Opus 4.5 specs →