RETIRING IN 227 DAYS
Sunset scheduled for 2027-05-15, reported by a third-party catalog. The identifier still resolves today. Sources disagree on: context_tokens, input_price_per_mtok, output_price_per_mtok.
state=dying sunset=2027-05-15 days_remaining=227 severity=high sources=litellm,openrouter evidence_tier=catalog confirmed_by_endpoint=false documented_by_provider=false replacement=none corroborated=yes divergent_fields=context_tokens,input_price_per_mtok,output_price_per_mtok checked=2026-09-30 15:40Z
openai/gpt-5.1
Vendor: openai. Tracked by 2 of 5 sources.
What each source reports
| Source | ID | Context | Max out | In $/Mtok | Out $/Mtok | Sunset |
|---|---|---|---|---|---|---|
| litellm | azure/eu/gpt-5.1 | 272,000 | 128,000 | $1.375 | $11 | 2027-05-15 |
| openrouter | openai/gpt-5.1 | 400,000 | 128,000 | $1.25 | $10 | — |
Change history
| Severity | Change | What | Detected |
|---|---|---|---|
| low | modified | openrouter/openai/gpt-5.1: capabilities gained web_search | 2026-09-19 |
| low | modified | openrouter/openai/gpt-5.1: context_tokens raised 272,000 to 400,000 | 2026-09-18 |
| info | repriced | azure/eu/gpt-5.1: input_price_per_mtok $1.38/Mtok to $1.38/Mtok | 2026-09-16 |
| info | repriced | azure/eu/gpt-5.1: cache_read_price_per_mtok $0.14/Mtok to $0.14/Mtok | 2026-09-16 |
| info | repriced | azure/us/gpt-5.1: input_price_per_mtok $1.38/Mtok to $1.38/Mtok | 2026-09-16 |
| info | repriced | azure/us/gpt-5.1: cache_read_price_per_mtok $0.14/Mtok to $0.14/Mtok | 2026-09-16 |
| high | modified | gpt-5.1: capabilities lost minimal_reasoning_effort | 2026-09-11 |
| low | added | new model openrouter/openai/gpt-5.1 (272,000 ctx) | 2026-09-06 |
| low | added | new model azure/us-gov/gpt-5.1 (272,000 ctx) | 2026-09-03 |
| medium | deprecated | azure/eu/gpt-5.1: deprecation announced for 2027-05-15 — in 267 days | 2026-08-21 |
| medium | deprecated | azure/global/gpt-5.1: deprecation announced for 2027-05-15 — in 267 days | 2026-08-21 |
| medium | deprecated | azure/gpt-5.1: deprecation announced for 2027-05-15 — in 267 days | 2026-08-21 |
| medium | deprecated | azure/us/gpt-5.1: deprecation announced for 2027-05-15 — in 267 days | 2026-08-21 |
| medium | deprecated | azure/eu/gpt-5.1: retires 2027-05-15 (in 267 days) | 2026-08-21 |
| medium | deprecated | azure/global/gpt-5.1: retires 2027-05-15 (in 267 days) | 2026-08-21 |
| medium | deprecated | azure/gpt-5.1: retires 2027-05-15 (in 267 days) | 2026-08-21 |
| medium | deprecated | azure/us/gpt-5.1: retires 2027-05-15 (in 267 days) | 2026-08-21 |
| info | modified | [source artifact — 6 providers changed identically on the same day] gpt-5.1: capabilities lost service_tier | 2026-06-27 |