New & deprecated LLM modelsMay 2026
In May 2026, 2 new models were released and 15 models were deprecated or scheduled to sunset. Newest release: Claude Opus 4.8.
New models — May 2026
2 models with a public release date in May 2026, joined to live list prices and benchmark scores.
| Model | Provider | Input / 1M | Output / 1M | Best score | Released |
|---|---|---|---|---|---|
| Claude Opus 4.8 | Anthropic | $5.00 | $25.00 | 91.0% | 28 May 2026 |
| gemini-3.5-flash | Google (Gemini) | $1.50 | $9.00 | 79.3% | 19 May 2026 |
Deprecated & sunsetting — May 2026
15 models with an upstream retirement or sunset date in May 2026. Plan migrations before the date to avoid broken calls.
| Model | Provider | Input / 1M | Output / 1M | Best score | Sunset date |
|---|---|---|---|---|---|
| grok-3 | xAI | $3.00 | $15.00 | 53.3% | Retired15 May 2026 |
| grok-4-0709 | xAI | $3.00 | $15.00 | 87.0% | Retired15 May 2026 |
| grok-4-1-fast-non-reasoning | xAI | $0.20 | $0.50 | — | Retired15 May 2026 |
| grok-4-1-fast-reasoning | xAI | $0.20 | $0.50 | — | Retired15 May 2026 |
| grok-4-fast-non-reasoning | xAI | $0.20 | $0.50 | 87.0% | Retired15 May 2026 |
| grok-4-fast-reasoning | xAI | $0.20 | $0.50 | 87.0% | Retired15 May 2026 |
| gemini-3.1-flash-lite-preview | Google (Gemini) | $0.25 | $1.50 | 81.8% | Retired25 May 2026 |
| kimi-k2-0711-preview | Moonshot AI | $0.60 | $2.50 | 59.1% | Retired25 May 2026 |
| kimi-k2-0905-preview | Moonshot AI | $0.60 | $2.50 | 59.1% | Retired25 May 2026 |
| kimi-k2-thinking | Moonshot AI | $0.60 | $2.50 | 59.1% | Retired25 May 2026 |
| kimi-k2-turbo-preview | Moonshot AI | $1.15 | $8.00 | 59.1% | Retired25 May 2026 |
| devstral-medium-2507 | Mistral | $0.40 | $2.00 | — | Retired31 May 2026 |
| devstral-small-2507 | Mistral | $0.10 | $0.30 | — | Retired31 May 2026 |
| mistral-large-2411 | Mistral | $2.00 | $6.00 | 51.3% | Retired31 May 2026 |
| pixtral-large-2411 | Mistral | $2.00 | $6.00 | — | Retired31 May 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.