How to read this finding
These shares refer to new monthly model derivatives on Hugging Face. They do not measure all model deployments, revenue, downloads, or the share of AI research. Approximate values are preserved as reported.
What changed with reasoning models?
Models could improve difficult answers by spending more computation at inference time. Training with automatically verifiable rewards, especially in mathematics and programming, helped make those reasoning paths more useful.
Evidence you can use
Open-weight model derivatives on Hugging Face
2025 report snapshot; new monthly model derivatives
| Measure | Reported value | Definition and source |
|---|---|---|
| Qwen | More than 40% | Share of new monthly derivatives2025 report, slide 45 (PDF page 46) |
| Llama | About 15% | Share at the report snapshot2025 report, slide 45 (PDF page 46) |
| Llama, late 2024 | About 50% | Earlier comparison in the report2025 report, slide 45 (PDF page 46) |
These shares refer to new monthly model derivatives on Hugging Face. They do not measure all model deployments, revenue, downloads, or the share of AI research. Approximate values are preserved as reported.
Sources and dates
Historical snapshot published October 9, 2025. This web edition was prepared on October 10, 2026 from the online deck and original launch posts. Findings and forecasts retain their original time frame.
- 2025 report, slide 12 (PDF page 13)Original 2025 report. Slide numbers printed in the deck are one lower than PDF page numbers because the cover is unnumbered.
- 2025 report, slide 18 (PDF page 19)Original 2025 report. Slide numbers printed in the deck are one lower than PDF page numbers because the cover is unnumbered.
- 2025 report, slide 21 (PDF page 22)Original 2025 report. Slide numbers printed in the deck are one lower than PDF page numbers because the cover is unnumbered.
- 2025 report, slide 22 (PDF page 23)Original 2025 report. Slide numbers printed in the deck are one lower than PDF page numbers because the cover is unnumbered.
- 2025 report, slide 30 (PDF page 31)Original 2025 report. Slide numbers printed in the deck are one lower than PDF page numbers because the cover is unnumbered.
- 2025 report, slide 32 (PDF page 33)Original 2025 report. Slide numbers printed in the deck are one lower than PDF page numbers because the cover is unnumbered.
- 2025 report, slide 33 (PDF page 34)Original 2025 report. Slide numbers printed in the deck are one lower than PDF page numbers because the cover is unnumbered.
- 2025 report, slide 45 (PDF page 46)Original 2025 report. Slide numbers printed in the deck are one lower than PDF page numbers because the cover is unnumbered.
- State of AI Report 2025: online slides
- Nathan Benaich: The State of AI Report 2025Air Street Press, October 9, 2025.
- Welcome to State of AI Report 2025Original website launch post, October 9, 2025.
Cite this page
Benaich, Nathan. “What changed with reasoning models?.” State of AI Report 2025. Historical report snapshot; web edition prepared 2026-10-10.