Home / All model prices / OpenAI / gpt-5-1-codex O OpenAI
gpt-5-1-codex OpenRouter price Model overview GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....
Context window 400,000 tokens
Knowledge cutoff —
Price last verified 2026-09-06
First observed 2026-08-11 Descriptions, capabilities, and tariffs come from the linked source. First-party prices take priority; OpenRouter fallbacks are labelled.
Current price Estimated API value in USD per million tokens, backed by OpenRouter's public Models API.
Input $1.25
Cached input $0.13
Cache write 5m —
Cache write 1h —
Output $10 Capabilities and formats text image include reasoning max completion tokens reasoning reasoning effort response format seed structured outputs tool choice tools Performance references No comparable benchmark data is currently available.
PRICE EVOLUTION Price history Original observation and every later change, including any change of price source.
Original observed price Official price unavailable 2026-08-11
Input: — Cached input: — Cache write 5m: — Cache write 1h: — Output: —
Price change OpenRouter price 2026-08-20
Input: $1.25 Cached input: $0.13 Cache write 5m: — Cache write 1h: — Output: $10
