Sources & verification notes

GPT-5.4

• Exact 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

• License

  Effective date not established; this is an observation. Checked Sep 13, 2026.

  No downloadable-weights license is represented for this API offering.

  • GPT-5.4 specifications ↗OpenAI · provider-authored · checked Sep 13, 2026