New & deprecated LLM modelsSeptember 2026
In September 2026, 9 new models were released and 15 models were deprecated or scheduled to sunset. Newest release: gpt-6.1-sol.
At a glance
In September 2026, 9 new models were released and 15 models were deprecated or scheduled to sunset. Newest release: gpt-6.1-sol.
New models — September 2026
9 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-6.1-sol | OpenAI | $2.00 | $10.00 | 95.4% | 29 Sept 2026 |
| claude-sonnet-5-5 | Anthropic | $2.00 | $10.00 | 95.6% | 28 Sept 2026 |
| gpt-6-sol | OpenAI | $2.00 | $10.00 | 94.3% | 22 Sept 2026 |
| claude-opus-5-5 | Anthropic | $4.00 | $20.00 | 90.6% | 22 Sept 2026 |
| gpt-6-luna | OpenAI | $0.10 | $0.50 | 90.5% | 22 Sept 2026 |
| xai/grok-4.7 | Perplexity | $2.00 | $6.00 | 92.7% | 21 Sept 2026 |
| gpt-6-astra | OpenAI | $10.00 | $50.00 | 95.8% | 3 Sept 2026 |
| gemini-3.8-flash | Google (Gemini) | $0.75 | $3.75 | 95.4% | 2 Sept 2026 |
| claude-fable-5-1 | Anthropic | $10.00 | $50.00 | 100.0% | 1 Sept 2026 |
Deprecated & sunsetting — September 2026
15 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 |
|---|---|---|---|---|---|
| qwen/qwen3.6-27b | Groq | $0.60 | $3.00 | 85.9% | Retired14 Sept 2026 |
| thinkingmachines/Inkling-Small | Together AI | $0.50 | $1.20 | 88.5% | Retired14 Sept 2026 |
| google/gemma-4-31B-it | Together AI | $0.39 | $0.97 | 75.8% | Retired15 Sept 2026 |
| openai/gpt-oss-20b | Together AI | $0.05 | $0.20 | 60.8% | Retired15 Sept 2026 |
| accounts/fireworks/models/deepseek-v4-flash-vision-exp | Fireworks AI | $0.22 | $0.66 | — | Retired25 Sept 2026 |
| accounts/fireworks/models/deepseek-v4-pro-0813 | Fireworks AI | $1.32 | $3.96 | 77.6% | Retired25 Sept 2026 |
| accounts/fireworks/models/glm-5p2 | Fireworks AI | $1.40 | $4.40 | 78.7% | Retired25 Sept 2026 |
| accounts/fireworks/models/kimi-k2p6 | Fireworks AI | $0.95 | $4.00 | 76.7% | Retired25 Sept 2026 |
| accounts/fireworks/models/kimi-k2p7-code | Fireworks AI | $0.95 | $4.00 | 87.9% | Retired25 Sept 2026 |
| accounts/fireworks/models/muse-glimmer-30b | Fireworks AI | $0.35 | $1.50 | — | Retired25 Sept 2026 |
| accounts/fireworks/routers/glm-5p2-fast-us | Fireworks AI | $2.10 | $6.60 | — | Retired25 Sept 2026 |
| gpt-3.5-turbo-1106 | OpenAI | $1.00 | $2.00 | 28.0% | Retired28 Sept 2026 |
| deepseek-ai/DeepSeek-V4-Flash-0731 | Together AI | $0.14 | $0.28 | 91.0% | Retired29 Sept 2026 |
| gemini-omni-flash-preview | Google (Gemini) | $1.50 | $9.00 | — | Retired30 Sept 2026 |
| labs-leanstral-1-5 | Mistral | Free | Free | — | Retired30 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.
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