Overview
Claude Opus 4.8 vs GPT-5.5 vs Gemini 3.1 Pro Preview: side-by-side summary
Claude Opus 4.8, GPT-5.5, and Gemini 3.1 Pro Preview are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Claude Opus 4.8, from Anthropic, has a 1,000,000-token context window and is priced at $5/M tokens input, $25/M tokens output on OpenRouter.
GPT-5.5, from OpenAI, has a 1,050,000-token context window and is priced at $5/M tokens input, $30/M tokens output on OpenRouter.
Gemini 3.1 Pro Preview, from Google, has a 1,048,576-token context window and is priced at $2/M tokens input, $12/M tokens output on OpenRouter.
- Context window
- Claude Opus 4.8: 1,000,000 tokens
- GPT-5.5: 1,050,000 tokens
- Gemini 3.1 Pro Preview: 1,048,576 tokens
- Price
- Claude Opus 4.8: $5/M tokens input, $25/M tokens output
- GPT-5.5: $5/M tokens input, $30/M tokens output
- Gemini 3.1 Pro Preview: $2/M tokens input, $12/M tokens output
- Provided by
- Claude Opus 4.8: Anthropic
- GPT-5.5: OpenAI
- Gemini 3.1 Pro Preview: Google