GPT-5.4
used in
0
stacks
OpenAI's more affordable frontier model for coding and professional work, sitting below GPT-5.5.
GPT-5.4 (API ID gpt-5.4) is described in OpenAI's API docs as "a more affordable model for coding and professional work," with a 1M-token context window, up to 128K output tokens, and an August 31, 2025 knowledge cutoff. A companion GPT-5.4 mini (400K context) is billed by OpenAI as its strongest mini model for coding, computer use, and subagents. Listed pricing is $2.50 input / $15 output per million tokens.
Strengths
- Half the per-token price of GPT-5.5 while staying in the frontier coding/professional tier
- 1M-token context window with up to 128K output tokens
- mini variant targeted at subagent and computer-use workloads for high-volume agent fleets
Tradeoffs
- OpenAI directs complex reasoning and coding to GPT-5.5 instead
- Older knowledge cutoff (Aug 31, 2025) than GPT-5.5