Overview
Claude Opus 5.5 vs GPT-6 Astra vs DeepSeek V4 Pro 0813 vs Kimi K3: side-by-side summary
Claude Opus 5.5, GPT-6 Astra, DeepSeek V4 Pro 0813, and Kimi K3 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Claude Opus 5.5, from Anthropic, has a 1,000,000-token context window and is priced at $4/M tokens input, $20/M tokens output on OpenRouter.
GPT-6 Astra, from OpenAI, has a 1,050,000-token context window and is priced at $10/M tokens input, $50/M tokens output on OpenRouter.
DeepSeek V4 Pro 0813, from DeepSeek, has a 1,048,576-token context window and is priced at $0.40/M tokens input, $4.30/M tokens output on OpenRouter.
Kimi K3, from moonshotai, has a 1,048,576-token context window and is priced at $1.499/M tokens input, $10.76/M tokens output on OpenRouter.
- Context window
- Claude Opus 5.5: 1,000,000 tokens
- GPT-6 Astra: 1,050,000 tokens
- DeepSeek V4 Pro 0813: 1,048,576 tokens
- Kimi K3: 1,048,576 tokens
- Price
- Claude Opus 5.5: $4/M tokens input, $20/M tokens output
- GPT-6 Astra: $10/M tokens input, $50/M tokens output
- DeepSeek V4 Pro 0813: $0.40/M tokens input, $4.30/M tokens output
- Kimi K3: $1.499/M tokens input, $10.76/M tokens output
- Provided by
- Claude Opus 5.5: Anthropic
- GPT-6 Astra: OpenAI
- DeepSeek V4 Pro 0813: DeepSeek
- Kimi K3: moonshotai