⚠ This model is no longer available
gpt-5.1-codex was removed from RealRelay on 2026-09-09. This page is kept as a historical record: prices mentioned below are no longer valid, and the API no longer serves this model.
gpt-5.1-codex
gpt-5.1-codex is a OpenAI model that was available through RealRelay until it was removed on 2026-09-09.
Similar models still available
Pricing
- no longer offered
- gpt-5.1-codex was removed from RealRelay on 2026-09-09. This page is kept as a historical record: prices mentioned below are no longer valid, and the API no longer serves this model.
Specifications (as of 2026-09-09)
- Context window
- 400K
- Max output
- 128K
- Released
- 2025-11-13
- Knowledge cutoff
- Sep 30, 2024
- Input
- Image / Text
- Output
- Text
- Capabilities
- Reasoning, Structured output, Tool use, Vision