Sources & verification notes
GPT-5.4
gpt-5.4-2026-03-05Exact identifier & access
Dated API snapshot. Access and lifecycle apply to this exact first-party identifier.
- GPT-5.4 specifications ↗OpenAI · provider-authored · checked Sep 13, 2026
First availability
Effective Mar 5, 2026. Checked Sep 13, 2026.
- API changelog ↗OpenAI · provider-authored · checked Sep 13, 2026
Availability status
Effective date not established; this is an observation. Checked Sep 13, 2026.
- GPT-5.4 specifications ↗OpenAI · provider-authored · checked Sep 13, 2026
Capabilities & limits
Effective date not established; this is an observation. Checked Sep 13, 2026.
- GPT-5.4 specifications ↗OpenAI · provider-authored · checked Sep 13, 2026
Input price
Effective date not established; this is an observation. Checked Sep 13, 2026.
- GPT-5.4 specifications ↗OpenAI · provider-authored · checked Sep 13, 2026
Output price
Effective date not established; this is an observation. Checked Sep 13, 2026.
- GPT-5.4 specifications ↗OpenAI · provider-authored · checked Sep 13, 2026
GPT-5.5
gpt-5.5Exact identifier & access
Undated API identifier. This pilot does not claim an immutable weights snapshot behind it.
- GPT-5.5 specifications ↗OpenAI · provider-authored · checked Sep 13, 2026
First availability
Effective date not established; this is an observation. Checked Sep 13, 2026.
- GPT-5.5 specifications ↗OpenAI · provider-authored · checked Sep 13, 2026
Availability status
Effective date not established; this is an observation. Checked Sep 13, 2026.
- GPT-5.5 specifications ↗OpenAI · provider-authored · checked Sep 13, 2026
Capabilities & limits
Effective date not established; this is an observation. Checked Sep 13, 2026.
- GPT-5.5 specifications ↗OpenAI · provider-authored · checked Sep 13, 2026
Input price
Effective date not established; this is an observation. Checked Sep 13, 2026.
- GPT-5.5 specifications ↗OpenAI · provider-authored · checked Sep 13, 2026
Output price
Effective date not established; this is an observation. Checked Sep 13, 2026.
- GPT-5.5 specifications ↗OpenAI · provider-authored · checked Sep 13, 2026