Claude Haiku 4.5 vs GPT-5.1-Codex-Max

Compare Claude Haiku 4.5 from Anthropic and GPT-5.1-Codex-Max from OpenAI on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.

Claude Haiku 4.5 vs GPT-5.1-Codex-Max: side-by-side summary

Claude Haiku 4.5 and GPT-5.1-Codex-Max are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Claude Haiku 4.5, from Anthropic, has a 200,000-token context window and is priced at $1/M tokens input, $5/M tokens output on OpenRouter.

GPT-5.1-Codex-Max, from OpenAI, has a 400,000-token context window and is priced at $1.25/M tokens input, $10/M tokens output on OpenRouter.

Context window: Claude Haiku 4.5: 200,000 tokens
GPT-5.1-Codex-Max: 400,000 tokens
Price: Claude Haiku 4.5: $1/M tokens input, $5/M tokens output
GPT-5.1-Codex-Max: $1.25/M tokens input, $10/M tokens output
Provided by: Claude Haiku 4.5: Anthropic
GPT-5.1-Codex-Max: OpenAI

Claude Haiku 4.5 vs GPT-5.1-Codex-Max

Compare Claude Haiku 4.5 from Anthropic and GPT-5.1-Codex-Max from OpenAI on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.