New & deprecated LLM modelsSeptember 2026
In September 2026, 2 new models were released and 3 models were deprecated or scheduled to sunset. Newest release: gpt-6-astra.
New models — September 2026
2 models with a public release date in September 2026, joined to live list prices and benchmark scores.
| Model | Provider | Input / 1M | Output / 1M | Best score | Released |
|---|---|---|---|---|---|
| gpt-6-astra | OpenAI | $10.00 | $50.00 | 95.8% | 3 Sept 2026 |
| claude-fable-5-1 | Anthropic | $10.00 | $50.00 | 100.0% | 1 Sept 2026 |
Deprecated & sunsetting — September 2026
3 models with an upstream retirement or sunset date in September 2026. Plan migrations before the date to avoid broken calls.
| Model | Provider | Input / 1M | Output / 1M | Best score | Sunset date |
|---|---|---|---|---|---|
| gpt-3.5-turbo-1106 | OpenAI | $1.00 | $2.00 | 28.0% | Sunsetting28 Sept 2026 |
| Claude Sonnet 4.5 | Anthropic | $3.00 | $15.00 | 71.3% | Sunsetting29 Sept 2026 |
| gemini-omni-flash-preview | Google (Gemini) | $1.50 | $9.00 | — | Sunsetting30 Sept 2026 |
Prices from the LLM API Pricing Index, synced daily. Release & benchmark data via Epoch AI (CC BY); deprecation dates from provider metadata. New models are those with a public release date this month that appear in the tracked price catalogue.
Get price-change alerts
One email when a model’s price changes, a new model launches, or a model you might rely on gets a deprecation date. No schedule, no newsletter — it only sends on days something actually changed.
Unsubscribe with one click, any time.
A model you rely on just got deprecated. Would you know?
StackSpend tracks every model you actually call, flags deprecations before they break you, and surfaces cheaper equal-quality swaps from this same live dataset.