LLM model retirement calendar, 2026
Every provider-announced retirement with days left, the recommended replacement and its price delta.
17 model ids carry a provider-announced retirement date as of 2026-10-26; 4 are already retired and 11 retire within 90 days, the next being claude-sonnet-4-5. The recommended replacement is on average -27.08% on blended price, and TokenZero flags each id in audits and in the X-TokenZero-Warning header.
· Source: TokenZero pricing table, benchmark result files and public audit ledger; CC BY 4.0 with attribution
At a glance
- Models with retirement dates
- 17
- Already retired
- 4 (computed)
- Retiring within 90 days
- 11 (computed)
- Next retirement
- claude-sonnet-4-5 (computed)
- Median replacement price delta
- -27.08% (computed)
- Sources
- OpenAI and Anthropic deprecation pages
- Where it shows
- audit findings, /models/
, X-TokenZero-Warning - Table
- 2026-10-26
LLM model retirement calendar, 2026 (first 17 of 17 rows; full dataset in the downloads)
| model | provider | retires | announced | days_left | replacement | replacement_blended_price_delta_pct |
|---|---|---|---|---|---|---|
| gpt-4.1-nano | openai | 2026-10-23 | 2026-04-22 | 0 | gpt-5.6-luna | 137.5 |
| o1 | openai | 2026-10-23 | 2026-04-22 | 0 | gpt-5.6-sol | -70.83 |
| o3-mini | openai | 2026-10-23 | 2026-04-22 | 0 | gpt-5.6-sol | 297.73 |
| o4-mini | openai | 2026-10-23 | 2026-04-22 | 0 | gpt-5.6-terra | 115.91 |
| claude-sonnet-4-5 | anthropic | 2026-11-30 | 2026-09-30 | 35 | claude-sonnet-5-5 | -33.33 |
| gpt-5 | openai | 2026-12-11 | 2026-06-11 | 46 | gpt-5.6-sol | 154.55 |
| gpt-5-mini | openai | 2026-12-11 | 2026-06-11 | 46 | gpt-5.6-terra | 590.91 |
| gpt-5-nano | openai | 2026-12-11 | 2026-06-11 | 46 | gpt-5.6-luna | 245.45 |
| gpt-5-pro | openai | 2026-12-11 | 2026-06-11 | 46 | gpt-5.6-sol | -78.79 |
| o3 | openai | 2026-12-11 | 2026-06-11 | 46 | gpt-5.6-sol | 118.75 |
| o3-pro | openai | 2026-12-11 | 2026-06-11 | 46 | gpt-5.6-sol | -78.12 |
| gpt-4o | openai | 2027-01-14 | 2026-10-14 | 80 | gpt-6-luna | -95.62 |
| gpt-4o-mini | openai | 2027-01-14 | 2026-10-14 | 80 | gpt-6-luna | -27.08 |
| gpt-4.1 | openai | 2027-01-14 | 2026-10-14 | 80 | gpt-6-luna | -94.53 |
| gpt-4.1-mini | openai | 2027-01-14 | 2026-10-14 | 80 | gpt-6-luna | -72.66 |
| gpt-5.1 | openai | 2027-04-01 | 2026-10-01 | 157 | gpt-6-sol | 27.27 |
| gpt-5.4-nano | openai | 2027-04-01 | 2026-10-01 | 157 | gpt-6-luna | -54.84 |
Method and licence
Computed at request time from the same data the gateway runs on; the JSON summary carries every number on this page. Reuse under CC BY 4.0 with a link to https://tokenzero.sh/reports/llm-model-retirement-calendar-2026.
Questions people ask
Which model retires next?
claude-sonnet-4-5; the full calendar is the table above with announced date, retirement date, days left and the provider's recommended replacement.
Does the replacement cost more?
On median the recommended replacement is -27.08% on blended price versus the retiring model; the per-model delta is in the dataset.
What happens if I keep sending a retired id?
The provider rejects it. Before that date TokenZero audits flag the id with the replacement, the model page shows a countdown, and the gateway sends X-TokenZero-Warning on every call that uses it.