OpenAI API — July, 2026

July 1, 2026

The release features the new GPT-5.6 model family, including Sol for frontier capability, Terra for intelligence and cost, and Luna for efficient workloads, all with advanced features like Programmatic Tool Calling and enhanced image processing. New GPT Transcribe and Live Transcribe models offer versatile transcription, alongside upgraded GPT-Realtime-2.1 for improved voice applications and an official Terraform provider for API platform resource management. Significant cost reductions are introduced for GPT-5.6 Luna (80%) and Terra (20%), complementing new Fast mode options for GPT-5.6 Sol and hard spend limits for better cost control.

Added

Released the official OpenAI Terraform provider for managing OpenAI API Platform resources as infrastructure as code.
Released GPT Transcribe for accurate file transcription and final transcripts of committed Realtime turns, along with GPT Live Transcribe for low-latency streaming transcription.
Added hard spend limits for organizations and projects on the OpenAI API platform. Set a monthly cap that causes affected API requests to return a 429 error when tracked spend reaches the limit. Use spend alerts for notification before traffic is interrupted. Read more in the spend limits guide.
Released the GPT-5.6 model family, including GPT-5.6 Sol for frontier capability, GPT-5.6 Terra for a balance of intelligence and cost, and GPT-5.6 Luna for efficient, high-volume workloads. The gpt-5.6 alias routes requests to gpt-5.6-sol.
Released GPT-Realtime-2.1, an updated realtime reasoning model with improved alphanumeric recognition, silence and noise handling, and interruption behavior. Also released GPT-Realtime-2.1 mini, a faster, lower-cost distilled reasoning model for realtime voice applications.

Changed

Starting July 30, GPT-5.6 Luna costs 80% less, while GPT-5.6 Terra costs 20% less. See pricing details.
We're also introducing Fast mode in the API, which replaces our Priority Processing offering. For GPT-5.6 Sol, Fast mode now delivers up to 2.5× faster speeds than standard processing at twice the price. This change is backward compatible: requests tagged priority will automatically use Fast mode.
Provision and manage projects, users, groups, roles, access assignments, service accounts, certificates, invitations, and project-level rate limits. Use standard Terraform workflows to review and apply changes, import existing resources, and detect and reconcile configuration drift. Install the provider from the Terraform Registry.
Both models support free-form transcription context, keyword hints, and multiple expected input languages. Compare supported outputs and workflows in the transcription guide.
GPT-5.6 adds Programmatic Tool Calling, explicit prompt caching controls, persisted reasoning, max reasoning effort, and Pro mode, and Multi-agent orchestration in beta for the Responses API. GPT-5.6 also accepts images at their original dimensions with original or auto image detail.