Overview
DeepSeek V3.1 Terminus vs GPT-5.1-Codex: side-by-side summary
DeepSeek V3.1 Terminus and GPT-5.1-Codex are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
DeepSeek V3.1 Terminus, from DeepSeek, has a 163,840-token context window and is priced at $0.27/M tokens input, $1/M tokens output on OpenRouter.
GPT-5.1-Codex, 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
- DeepSeek V3.1 Terminus: 163,840 tokens
- GPT-5.1-Codex: 400,000 tokens
- Price
- DeepSeek V3.1 Terminus: $0.27/M tokens input, $1/M tokens output
- GPT-5.1-Codex: $1.25/M tokens input, $10/M tokens output
- Provided by
- DeepSeek V3.1 Terminus: DeepSeek
- GPT-5.1-Codex: OpenAI