Qwen3.8 Flash vs Claude Opus 5 (Fast): side-by-side summary

Qwen3.8 Flash and Claude Opus 5 (Fast) are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Qwen3.8 Flash, from Qwen, has a 1,000,000-token context window and is priced at $0.16/M tokens input, $0.47/M tokens output on OpenRouter.

Claude Opus 5 (Fast), from Anthropic, has a 1,000,000-token context window and is priced at $10/M tokens input, $50/M tokens output on OpenRouter.

Context window

• Qwen3.8 Flash: 1,000,000 tokens
• Claude Opus 5 (Fast): 1,000,000 tokens

Price

• Qwen3.8 Flash: $0.16/M tokens input, $0.47/M tokens output
• Claude Opus 5 (Fast): $10/M tokens input, $50/M tokens output

Provided by

• Qwen3.8 Flash: Qwen
• Claude Opus 5 (Fast): Anthropic

• Qwen3.8 Flash model details, providers and pricing
• Claude Opus 5 (Fast) model details, providers and pricing