API capability - Tool calling
AI models with tool calling
150 of the 167 models in the registry have tool calling, according to each provider's own docs. The cheapest by output price is GLM-4-32B-0414-128K from Z.ai at $0.10 per 1M output tokens. The largest context window among them is 1.05M tokens, on GPT-6 Luna.
Capabilities checked . Sources
- Models with Yes
- 150 of 167
- Lowest output / 1M
- $0.10
- Largest context
- 1.05M
- Not stated
- 11
Every model with tool calling, cheapest first
Prices in USD per 1M tokens at the standard rate, sorted by output price. 6 models are documented without it, and for 11 models the provider's docs do not say (Not stated).
FAQ
What is the cheapest model with tool calling?
GLM-4-32B-0414-128K from Z.ai is the cheapest model with tool calling in the registry as of October 18, 2026, at $0.10 per 1M input tokens and $0.10 per 1M output tokens on the provider's own API.
Which model with tool calling has the largest context window?
GPT-6 Luna from OpenAI has the largest context window among models with tool calling: 1.05M tokens, at $0.50 per 1M output tokens.
How many AI models have tool calling?
150 of the 167 models in the registry have tool calling. 6 models do not, and for 11 models the provider's docs do not say either way.
What counts as tool calling?
The API lets the model call functions you define. You describe each tool with a JSON schema, the model replies with a structured call, and your code runs it. Each Yes on this page links to the provider's own documentation page that states it.
Sources
Every Yes links to the provider doc page that states it, checked on . Prices and context windows come from each model's pricing page; open a model for its rate card and pricing sources.
Documentation pages read (99)
- https://docs.z.ai/guides/llm/glm-4-32b-0414-128k
- https://docs.mistral.ai/models/ministral-3-3b-25-12
- https://www.alibabacloud.com/help/en/model-studio/text-generation-model
- https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-amazon-nova-micro.html
- https://docs.cohere.com/docs/command-r7b
- https://docs.mistral.ai/models/ministral-3-8b-25-12
- https://docs.mistral.ai/models/ministral-3-14b-25-12
- https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-amazon-nova-lite.html
- https://mimo.mi.com/models/en-US/mimo-v2.6-flash
- https://platform.stepfun.ai/docs/en/guides/models/step-3.5-flash
- https://platform.stepfun.ai/docs/en/guides/models/overview
- https://developers.openai.com/api/docs/models/gpt-5-nano
- https://www.alibabacloud.com/help/en/model-studio/qwen-function-calling
- https://docs.z.ai/guides/llm/glm-4.7
- https://ai.google.dev/gemini-api/docs/models/gemini-2.5-flash-lite
- https://developers.openai.com/api/docs/models/gpt-4.1-nano
- https://docs.byteplus.com/en/docs/ModelArk/model-list
- https://docs.ai21.com/docs/function-calling
- https://platform.claude.com/docs/en/about-claude/models/overview
- https://developers.openai.com/api/docs/models/gpt-6-luna
- https://docs.z.ai/guides/vlm/glm-5.3-flash
- https://www.tencentcloud.com/document/product/1300/78934
- https://docs.cohere.com/v2/docs/tool-use-overview
- https://developers.openai.com/api/docs/models/gpt-4o-mini
- https://docs.mistral.ai/models/mistral-small-4-0-26-03
- https://docs.inceptionlabs.ai/get-started/models
- https://mimo.mi.com/models/en-US/mimo-v2.6-pro
- https://docs.mistral.ai/models/codestral-25-08
- https://docs.z.ai/guides/vlm/glm-4.6v
- https://docs.z.ai/guides/llm/glm-4.5
- https://platform.stepfun.ai/docs/en/guides/models/step-3.7-flash
- https://developers.openai.com/api/docs/models/gpt-5.6-luna
- https://api-docs.deepseek.com/quick_start/pricing
- https://platform.minimax.io/docs/api-reference/text-anthropic-api
- https://developers.openai.com/api/docs/models/gpt-5.4-nano
- https://ai.google.dev/gemini-api/docs/models/gemini-3.1-flash-lite
- https://docs.mistral.ai/models/mistral-large-3-25-12
- https://developers.openai.com/api/docs/models/gpt-4.1-mini
- https://developers.openai.com/api/docs/models/gpt-5-mini
- https://docs.x.ai/developers/models/grok-build-0.1
- https://docs.z.ai/guides/llm/glm-4.6
- https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-amazon-nova-2-lite.html
- https://ai.google.dev/gemini-api/docs/models/gemini-2.5-flash
- https://ai.google.dev/gemini-api/docs/models/gemini-3.5-flash-lite
- https://docs.x.ai/developers/models/grok-4.20-0309-reasoning
- https://docs.x.ai/developers/models/grok-4.20-0309-non-reasoning
- https://docs.x.ai/developers/models/grok-4.20-multi-agent-0309
- https://docs.x.ai/developers/models/grok-4.3
- https://platform.stepfun.ai/docs/en/guides/models/step-5-preview
- https://ai.google.dev/gemini-api/docs/models/gemini-3-flash-preview
- https://docs.aws.amazon.com/nova/latest/userguide/tool-use.html
- https://docs.z.ai/guides/llm/glm-5
- https://ai.google.dev/gemini-api/docs/models/gemini-3.6-flash
- https://ai.google.dev/gemini-api/docs/models/gemini-3.8-flash
- https://platform.kimi.ai/docs/guide/kimi-k2-6-quickstart
- https://platform.kimi.ai/docs/guide/kimi-k2-7-code-quickstart
- https://docs.mistral.ai/models/mistral-large-4-0
- https://developers.openai.com/api/docs/models/o3-mini
- https://developers.openai.com/api/docs/models/o4-mini
- https://docs.z.ai/guides/llm/glm-5.1
- https://docs.z.ai/guides/llm/glm-5.2
- https://docs.z.ai/guides/llm/glm-5.3
- https://developers.openai.com/api/docs/models/gpt-5.4-mini
- https://platform.claude.com/docs/en/agents-and-tools/tool-use/overview
- https://ai.google.dev/gemini-api/docs/robotics-overview
- https://docs.x.ai/developers/models/grok-4.5
- https://docs.x.ai/developers/models/grok-4.6
- https://docs.x.ai/developers/models/grok-4.7
- https://docs.mistral.ai/models/mistral-medium-3-5-26-04
- https://developers.openai.com/api/docs/models/gpt-4.1
- https://developers.openai.com/api/docs/models/o3
- https://ai.google.dev/gemini-api/docs/models/gemini-2.5-pro
- https://developers.openai.com/api/docs/models/gpt-5
- https://developers.openai.com/api/docs/models/gpt-5.1
- https://ai.google.dev/gemini-api/docs/models/gemini-4-argon
- https://developers.openai.com/api/docs/models/gpt-6-sol
- https://developers.openai.com/api/docs/models/gpt-6.1-sol
- https://docs.cohere.com/docs/command-a
- https://developers.openai.com/api/docs/models/gpt-4o
- https://ai.google.dev/gemini-api/docs/models/gemini-3.1-pro-preview
- https://developers.openai.com/api/docs/models/gpt-5.6-terra
- https://developers.openai.com/api/docs/models/gpt-5.2
- https://developers.openai.com/api/docs/models/gpt-5.3-codex
- https://developers.openai.com/api/docs/models/gpt-5.4
- https://platform.kimi.ai/docs/guide/kimi-k3-quickstart
- https://developers.openai.com/api/docs/models/gpt-5.6-sol
- https://developers.openai.com/api/docs/models/chat-latest
- https://developers.openai.com/api/docs/models/gpt-5.5
- https://developers.openai.com/api/docs/models/gpt-4-turbo
- https://platform.claude.com/docs/en/models/fable-5-1/whats-new-fable-5-1
- https://platform.claude.com/docs/en/build-with-claude/thinking
- https://platform.claude.com/docs/en/agents-and-tools/tool-use/define-tools
- https://developers.openai.com/api/docs/models/gpt-6-astra
- https://developers.openai.com/api/docs/models/o1
- https://developers.openai.com/api/docs/models/gpt-5.6-cyber
- https://developers.openai.com/api/docs/models/o3-pro
- https://developers.openai.com/api/docs/models/gpt-5-pro
- https://developers.openai.com/api/docs/models/gpt-5.5-pro
- https://developers.openai.com/api/docs/models/o1-pro
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