tiers:
- name: terra
models:
- name: gpt-5.6-terra
verified: "2026-09-23"
sources: [https://developers.openai.com/api/docs/models/gpt-5.6-terra]
effort:
kind: configurable
control: reasoning.effort
supported_levels: [none, low, medium, high, xhigh, max]
levels:
- name: none
description: >-
No explicit reasoning is needed: direct mechanical edits or exact application of a supplied checklist with no unresolved interactions.
- name: low
description: >-
The stage is short, local and familiar, with explicit requirements and an obvious solution or review checklist.
- name: medium
description: >-
The stage needs several reasoning steps and checking ordinary interactions, with a clear approach and bounded scope.
- name: high
description: >-
The stage needs sustained reasoning about subtle behavior, multiple components, non-obvious failure modes or competing approaches.
- name: xhigh
description: >-
The stage needs extended exploration, long-horizon implementation or review, or repeated testing of interacting hypotheses beyond high effort.
- name: max
description: >-
The stage approaches this model's capability limit and requires its deepest supported analysis; lower effort would leave major unresolved risks.
description: >-
Reliable at implementing and reviewing well-scoped work across several files, including
debugging and non-obvious interactions when the approach is clear. May need help with complex,
open-ended design requiring sustained judgement.
- name: sol
models:
- name: gpt-5.6-sol
verified: "2026-09-23"
sources: [https://developers.openai.com/api/docs/models/gpt-5.6-sol]
effort:
kind: configurable
control: reasoning.effort
supported_levels: [none, low, medium, high, xhigh, max]
levels:
- name: none
description: >-
No explicit reasoning is needed: direct mechanical edits or exact application of a supplied checklist with no unresolved interactions.
- name: low
description: >-
The stage is short, local and familiar, with explicit requirements and an obvious solution or review checklist.
- name: medium
description: >-
The stage needs several reasoning steps and checking ordinary interactions, with a clear approach and bounded scope.
- name: high
description: >-
The stage needs sustained reasoning about subtle behavior, multiple components, non-obvious failure modes or competing approaches.
- name: xhigh
description: >-
The stage needs extended exploration, long-horizon implementation or review, or repeated testing of interacting hypotheses beyond high effort.
- name: max
description: >-
The stage approaches this model's capability limit and requires its deepest supported analysis; lower effort would leave major unresolved risks.
description: >-
Reliable at complex, open-ended design and research: weighing architectures and unfamiliar
approaches, anticipating failure modes, and making security-critical judgements. Carries subtle
multi-file implementation and review through with sustained judgement.
- name: astra
models:
- name: gpt-6-astra
verified: "2026-09-23"
sources: [https://developers.openai.com/api/docs/models/gpt-6-astra]
effort:
kind: configurable
control: reasoning.effort
supported_levels: [low, medium, high, xhigh, max]
levels:
- name: low
description: >-
The stage is short, local and familiar, with explicit requirements and an obvious solution or review checklist.
- name: medium
description: >-
The stage needs several reasoning steps and checking ordinary interactions, with a clear approach and bounded scope.
- name: high
description: >-
The stage needs sustained reasoning about subtle behavior, multiple components, non-obvious failure modes or competing approaches.
- name: xhigh
description: >-
The stage needs extended exploration, long-horizon implementation or review, or repeated testing of interacting hypotheses beyond high effort.
- name: max
description: >-
The stage approaches this model's capability limit and requires its deepest supported analysis; lower effort would leave major unresolved risks.
description: >-
Strongest at open-ended design and research: choosing between architectures, working in
unfamiliar territory with no precedent in the codebase, anticipating failure modes, and
security-critical judgement.