Models Reference

This page lists models that expose structured output, reasoning, text verbosity, and tokenization modality support. Model names prefer aliases where available; otherwise the table shows the minimal model string (including provider prefix when required). The provider column reflects the default provider used by fast-agent (models may become available with multiple providers in the future).

Model	Provider	Tokenizes	Structured Output	Reasoning	Verbosity
qwen-long	aliyun	Text	json (schema)	—	—
qwen-max	aliyun	Text, Vision	json (object)	—	—
qwen-plus	aliyun	Text, Vision	json (object)	—	—
qwen-turbo	aliyun	Text, Vision	json (object)	—	—
qwen3-max	aliyun	Text	json (schema)	—	—
anthropic.claude-3-5-haiku	anthropic	Text, Vision, Document	tool_use	—	—
anthropic.claude-3-5-sonnet	anthropic	Text, Vision, Document	tool_use	—	—
anthropic.claude-3-7-sonnet	anthropic	Text, Vision, Document	tool_use	budget: 0, 1024, 16000, 32000, off Example: anthropic.claude-3-7-sonnet?reasoning=1024	—
anthropic.claude-3-haiku	anthropic	Text, Vision, Document	tool_use	—	—
anthropic.claude-3-opus	anthropic	Text, Vision, Document	tool_use	—	—
anthropic.claude-3-sonnet-20240229	anthropic	Text, Vision, Document	tool_use	—	—
anthropic.claude-3-sonnet	anthropic	Text, Vision, Document	tool_use	—	—
anthropic.claude-haiku-4-5-20251001	anthropic	Text, Vision, Document	json (schema)	budget: 0, 1024, 16000, 32000, off Example: anthropic.claude-haiku-4-5-20251001?reasoning=1024	—
claude-3-5-haiku-20241022	anthropic	Text, Vision, Document	tool_use	—	—
claude-3-5-sonnet-20240620	anthropic	Text, Vision, Document	tool_use	—	—
claude-3-5-sonnet-20241022	anthropic	Text, Vision, Document	tool_use	—	—
claude-3-7-sonnet-20250219	anthropic	Text, Vision, Document	tool_use	budget: 0, 1024, 16000, 32000, off Example: claude-3-7-sonnet-20250219?reasoning=1024	—
claude-3-opus-20240229	anthropic	Text, Vision, Document	tool_use	—	—
claude-opus-4-0	anthropic	Text, Vision, Document	tool_use	budget: 0, 1024, 16000, 32000, off Example: claude-opus-4-0?reasoning=1024	—
claude-opus-4-20250514	anthropic	Text, Vision, Document	tool_use	budget: 0, 1024, 16000, 32000, off Example: claude-opus-4-20250514?reasoning=1024	—
claude-sonnet-4-20250514	anthropic	Text, Vision, Document	tool_use	budget: 0, 1024, 16000, 32000, off Example: claude-sonnet-4-20250514?reasoning=1024	—
claude-sonnet-4-5-20250929	anthropic	Text, Vision, Document	json (schema)	budget: 0, 1024, 16000, 32000, off Example: claude-sonnet-4-5-20250929?reasoning=1024	—
claude	anthropic	Text, Vision, Document	json (schema)	budget: 0, 1024, 16000, 32000, off Example: claude?reasoning=1024	—
haiku35	anthropic	Text, Vision, Document	tool_use	—	—
haiku3	anthropic	Text, Vision, Document	tool_use	—	—
haiku	anthropic	Text, Vision, Document	json (schema)	budget: 0, 1024, 16000, 32000, off Example: haiku?reasoning=1024	—
opus3	anthropic	Text, Vision, Document	tool_use	—	—
opus4	anthropic	Text, Vision, Document	json (schema)	budget: 0, 1024, 16000, 32000, off Example: opus4?reasoning=1024	—
opus	anthropic	Text, Vision, Document	json (schema)	budget: 0, 1024, 16000, 32000, off Example: opus?reasoning=1024	—
sonnet35	anthropic	Text, Vision, Document	tool_use	—	—
sonnet37	anthropic	Text, Vision, Document	tool_use	budget: 0, 1024, 16000, 32000, off Example: sonnet37?reasoning=1024	—
sonnet4	anthropic	Text, Vision, Document	tool_use	budget: 0, 1024, 16000, 32000, off Example: sonnet4?reasoning=1024	—
deepseek	deepseek	Text	json (schema)	—	—
passthrough	fast-agent	Text	json (schema)	—	—
playback	fast-agent	Text	json (schema)	—	—
silent	fast-agent	Text	json (schema)	—	—
slow	fast-agent	Text	json (schema)	—	—
gemini-2.5-flash-preview-05-20	google	Text, Vision, Document, Audio, Video	json (schema)	—	—
gemini-2.5-pro-preview-05-06	google	Text, Vision, Document, Audio, Video	json (schema)	—	—
gemini25	google	Text, Vision, Document, Audio, Video	json (schema)	—	—
gemini25pro	google	Text, Vision, Document, Audio, Video	json (schema)	—	—
gemini2	google	Text, Vision, Document, Audio, Video	json (schema)	—	—
gemini3	google	Text, Vision, Document, Audio, Video	json (schema)	—	—
gemini3flash	google	Text, Vision, Document, Audio, Video	json (schema)	—	—
google.gemini-2.5-flash-preview	google	Text, Vision, Document, Audio, Video	json (schema)	—	—
google.gemini-2.5-flash	google	Text, Vision, Document, Audio, Video	json (schema)	—	—
google.gemini-2.5-pro-preview	google	Text, Vision, Document, Audio, Video	json (schema)	—	—
groq.deepseek-r1-distill-llama-70b	groq	Text	json (object)	—	—
groq.moonshotai/kimi-k2-thinking-0905	groq	Text	json (object)	—	—
groq.moonshotai/kimi-k2	groq	Text	json (object)	—	—
groq.qwen/qwen3-32b	groq	Text	json (object)	—	—
kimi	groq	Text	json (object)	—	—
kimithink	groq	Text	json (object)	—	—
deepseek31	hf	Text	json (schema)	—	—
deepseek32	hf	Text	json (schema)	—	—
glm	hf	Text	json (object)	toggle: on, off Example: glm?reasoning=off	—
gpt-oss-20b	hf	Text	json (object)	—	—
gpt-oss	hf	Text	json (object)	—	—
hf.minimaxai/minimax-m2	hf	Text	json (object)	—	—
hf.zai-org/glm-4.6	hf	Text	json (object)	—	—
kimi25	hf	Text, Vision	json (schema)	toggle: on, off Example: kimi25?reasoning=off	—
minimax	hf	Text	json (object)	—	—
qwen3	hf	Text	json (schema)	—	—
gpt-4.1-mini	openai	Text, Vision, Document	json (schema)	—	—
gpt-4.1-nano	openai	Text, Vision, Document	json (schema)	—	—
gpt-4.1	openai	Text, Vision, Document	json (schema)	—	—
gpt-4o	openai	Text, Vision, Document	json (schema)	—	—
openai.gpt-4.1-2025-04-14	openai	Text, Vision, Document	json (schema)	—	—
openai.gpt-4.1-mini-2025-04-14	openai	Text, Vision, Document	json (schema)	—	—
openai.gpt-4.1-nano-2025-04-14	openai	Text, Vision, Document	json (schema)	—	—
openai.gpt-4o-2024-11-20	openai	Text, Vision, Document	json (schema)	—	—
openai.gpt-4o-mini-2024-07-18	openai	Text, Vision, Document	json (schema)	—	—
codex	responses	Text, Vision, Document	json (schema)	effort: low, medium, high, xhigh Example: codex.medium	low, medium, high Example: codex?verbosity=low
gpt-5-mini	responses	Text, Vision, Document	json (schema)	effort: minimal, low, medium, high Example: gpt-5-mini.medium	low, medium, high Example: gpt-5-mini?verbosity=low
gpt-5-nano	responses	Text, Vision, Document	json (schema)	effort: minimal, low, medium, high Example: gpt-5-nano.medium	low, medium, high Example: gpt-5-nano?verbosity=low
gpt-5.1-codex	responses	Text, Vision, Document	json (schema)	effort: low, medium, high, xhigh Example: gpt-5.1-codex.medium	low, medium, high Example: gpt-5.1-codex?verbosity=low
gpt-5	responses	Text, Vision, Document	json (schema)	effort: minimal, low, medium, high Example: gpt-5.medium	low, medium, high Example: gpt-5?verbosity=low
gpt51	responses	Text, Vision, Document	json (schema)	effort: none, low, medium, high, xhigh, off Example: gpt51.medium	low, medium, high Example: gpt51?verbosity=low
gpt52	responses	Text, Vision, Document	json (schema)	effort: minimal, low, medium, high Example: gpt52.medium	low, medium, high Example: gpt52?verbosity=low
o1	responses	Text, Vision	json (schema)	effort: minimal, low, medium, high, xhigh Example: o1.medium	—
o3-mini	responses	Text	json (schema)	effort: low, medium, high Example: o3-mini.medium	—
o3	responses	Text, Vision, Document	json (schema)	effort: low, medium, high Example: o3.medium	—
o4-mini	responses	Text, Vision, Document	json (schema)	effort: low, medium, high Example: o4-mini.medium	—
responses.o1-2024-12-17	responses	Text, Vision	json (schema)	effort: minimal, low, medium, high, xhigh Example: responses.o1-2024-12-17.medium	—
responses.o3-2025-04-16	responses	Text, Vision, Document	json (schema)	effort: low, medium, high Example: responses.o3-2025-04-16.medium	—
responses.o3-mini-2025-01-31	responses	Text	json (schema)	effort: low, medium, high Example: responses.o3-mini-2025-01-31.medium	—
responses.o3-pro	responses	Text	json (schema)	—	—
responses.o4-mini-2025-04-16	responses	Text, Vision, Document	json (schema)	effort: low, medium, high Example: responses.o4-mini-2025-04-16.medium	—
grok-3-fast	xai	Text	json (schema)	—	—
grok-3-mini-fast	xai	Text	json (schema)	—	—
grok-3-mini	xai	Text	json (schema)	—	—
grok-3	xai	Text	json (schema)	—	—
grok-4-0709	xai	Text	json (schema)	—	—
grok-4-fast-reasoning	xai	Text, Vision	json (schema)	—	—
grok-4-fast	xai	Text, Vision	json (schema)	—	—
grok-4	xai	Text	json (schema)	—	—