Previous edition: finish_reason mix per model, April 2026
finish_reason mix per model, October 2026
finish_reason mix per model, October 2026
Successful completions only, normalized to 100%. Click a legend item to isolate.
In October 2026 deepseek-v4.1-flash-1017 ended 73% of successful completions with tool_calls, the highest among the busiest models.Top models by usage; finish_reason was not populated before 2026. Source: Requesty production gateway.
Which models are used most for tool calling? In October 2026 deepseek-v4.1-flash-1017 ended 73% of successful completions with tool_calls, the highest among the busiest models. gpt-4.1-mini was at 0%, used almost entirely for plain completions.
Why it mattersModels with a high tool_calls share are the ones teams run inside agents. A low share points to chat, extraction or batch use.
Period
Oct 2026
Updated
November 11, 2026
ID
finish-reason-by-model-october-2026
§ 01
Key findings
- 01deepseek-v4.1-flash-1017: 73% tool_calls.
- 02gemini-3.8-flash: 63% tool_calls.
- 03deepseek-v4.1-flash: 58% tool_calls.
- 04glm-5.3-flash: 48% tool_calls.
- 05gpt-6-luna: 27% tool_calls.
§ 01b
Questions this answers
- Which LLM is used most for tool calling?
- What is the finish_reason mix by model?
- Which models are used for agents?
§ 02
Data
| Model | tool_calls(percent) | stop(percent) | length(percent) |
|---|---|---|---|
| deepseek-v4.1-flash-1017 | 72.88% | 25.57% | 1.55% |
| gemini-3.8-flash | 63.13% | 34.99% | 1.88% |
| deepseek-v4.1-flash | 57.78% | 40.56% | 1.66% |
| glm-5.3-flash | 48.34% | 43.74% | 7.92% |
| gpt-6-luna | 27.17% | 72.30% | 0.53% |
| claude-opus-5-5 | 25.20% | 72.76% | 2.03% |
| gpt-5.6-luna | 24.76% | 74.59% | 0.65% |
| claude-sonnet-5 | 23.95% | 66.31% | 9.74% |
| deepseek-v4-flash-0731 | 8.22% | 90.29% | 1.49% |
| gemma-4-26B-A4B-it | 3.29% | 96.68% | 0.03% |
| gemini-3.5-flash-lite | 1.92% | 98.06% | 0.02% |
| gemma-4-31B-it | 0.98% | 98.98% | 0.04% |
| gemini-2.5-flash-lite | 0.46% | 99.32% | 0.22% |
| gpt-4.1-mini | 0.37% | 99.59% | 0.05% |
§ 03
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ID: finish-reason-by-model-october-2026·Updated November 11, 2026·Period Oct 2026