claude-sonnet-4-5-20250929 shuts down on 2026-11-30 per Anthropic's deprecation page (checked 2026-10-17). The official replacement is claude-sonnet-5-5. On the labeled example of 10 million input tokens and 2 million output tokens, claude-sonnet-5-5 costs $40 a month, lower than $60 for claude-sonnet-4-5-20250929.
deprecated
| Announced | 2026-09-30 |
|---|---|
| Deprecated | 2026-09-30 |
| Shutdown | 2026-11-30 |
| Kind | exact |
See the replacement diff · Anthropic models
| Input price / 1M | $3 · source, checked 2026-10-17 |
|---|---|
| Output price / 1M | $15 · source, checked 2026-10-17 |
| Cached input / 1M | $0.3 · source, checked 2026-10-17 |
| Context window | 200,000 · source, checked 2026-10-17 |
| Max output | 64,000 · source, checked 2026-10-17 |
| Reasoning | Not published |
| Vision | Not published |
| Tools | Not published |
claude-sonnet-4-5-20250929 shuts down on 2026-11-30 per Anthropic's deprecation page (checked 2026-10-17). The official replacement is claude-sonnet-5-5. On the labeled example of 10 million input tokens and 2 million output tokens, claude-sonnet-5-5 costs $40 a month, lower than $60 for claude-sonnet-4-5-20250929.
The official replacement is claude-sonnet-5-5.
claude-sonnet-4-5-20250929 status is deprecated.
claude-sonnet-4-5-20250929 | Deprecated | September 30, 2026 | November 30, 2026
Model ID: claude-sonnet-4-5-20250929 | context window 200000 | max output 64000 | input $3/MTok | output $15/MTok