Claims and evidence
- Released Primary source[1] [3]February 24th, 2025
- Deprecated Primary source[4]2025-10-28: Claude Sonnet 3.7 model [3]October 28, 2025
- Retired Primary source[4]2025-10-28: Claude Sonnet 3.7 model [3]February 19, 2026
- Status Retired Primary source[4]Model status
- Successor of Claude 3.5 Sonnet (New)The announcement presents the standard mode as an upgraded Claude 3.5 Sonnet without naming a snapshot; the October 2024 upgrade was the current Claude 3.5 Sonnet at the time. Primary source[1]
- Change · Reasoning Adds an optional extended thinking mode that shows step-by-step reasoning before the answer; the standard mode remains available.Compared with Claude 3.5 Sonnet (New) Primary source[1] [5]section 1.2
- Change · Reasoning API users can set a thinking budget in tokens, up to an output limit that the announcement gives as 128K tokens.Compared with Claude 3.5 Sonnet (New) Primary source[1]
- Change · Training data Trained on public web data through November 2024, with a knowledge cutoff at the end of October 2024.Compared with Claude 3.5 Sonnet (New) Primary source[5]
- Input text, image Primary source[2]Claude 3.7 Sonnet Summary Table, Modalities
- Output text Primary source[2]Claude 3.7 Sonnet Summary Table, Modalities
- Feature Reasoning mode Primary source[1] [5]section 1.2
- Parameters Not disclosedNot disclosed by Anthropic. No claim madeNo source
- Access consumer app, API, cloud partner Primary source[1]
Lineage
Predecessors
- Claude 3.5 Sonnet (New) · 22 October 2024
Successors
- Claude Sonnet 4 · 22 May 2025
Based on
Not derived from another model.
Variants and derived
None recorded.
Siblings
None recorded.
All ancestors
- Claude · 14 March 2023
- Claude 2 · 11 July 2023
- Claude 2.1 · 21 November 2023
- Claude 3 Sonnet · 4 March 2024
- Claude 3.5 Sonnet · 20 June 2024
- Claude 3.5 Sonnet (New) · 22 October 2024
All descendants
- Claude Sonnet 4 · 22 May 2025
- Claude Sonnet 4.5 · 29 September 2025
- Claude Sonnet 4.6 · 17 February 2026
- Claude Sonnet 5 · 30 June 2026
- Claude Sonnet 5.5 · 28 September 2026
Variants
No variants recorded in this record.
Related AI Radar coverage
AI Radar coverage starts in June 2026; no coverage linked yet.