Map Claude 4.6 effort properly onto OpenAI reasoning effort

[GrahamCampbell]

4.6 models don't use reasoning tokens, and the mapping to none/low/high buckets was incorrect as different models have different supported reasoning efforts.

Model	Released	none	minimal	low	medium	high	xhigh	Default
gpt-5	Aug 7, 2025	❌	✅	✅	✅	✅	❌	medium
gpt-5-mini	Aug 7, 2025	—	—	✅	✅	✅	❌	medium
gpt-5-nano	Aug 7, 2025	—	—	—	—	—	—	N/A (limited)
gpt-5-pro	Aug 2025	❌	❌	❌	❌	✅	❌	high
gpt-5-codex	Aug 2025	❌	❌	✅	✅	✅	❌	medium
gpt-5.1	Nov 12, 2025	✅	❌	✅	✅	✅	❌	none
gpt-5.1-codex	Nov 2025	✅	❌	✅	✅	✅	❌	—
gpt-5.1-codex-mini	Nov 2025	✅	❌	✅	✅	✅	❌	—
gpt-5.1-codex-max	Nov 19, 2025	✅	❌	✅	✅	✅	✅	—
gpt-5.2	Dec 11, 2025	✅	❌	✅	✅	✅	✅	none
gpt-5.2-pro	Dec 11, 2025	❌	❌	❌	✅	✅	✅	—
gpt-5.2-codex	Dec 2025	❌	❌	✅	✅	✅	✅	—
gpt-5.3-codex	Feb 5, 2026	❌	❌	✅	✅	✅	✅	—
gpt-5.4	Mar 5, 2026	✅	❌	✅	✅	✅	✅	none
gpt-5.4-pro	Mar 5, 2026	❌	❌	❌	✅	✅	✅	high
gpt-5.4-mini	Mar 17, 2026	✅	❌	✅	✅	✅	❌	none
gpt-5.4-nano	Mar 17, 2026	—	—	—	—	—	—	N/A (limited)