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Agent guide

Best AI models for agents

This page prioritizes models with tool use and structured output support because those signals matter most for automations, task routing, and production agent behavior.

Live signalTool support for calling actions and external systems
Live signalStructured output support for reliable machine-readable payloads
Live signalContext room for multi-step agent state and instructions
Live signalLive pricing for production automation budgeting
Fast answer

Start with the live shortlist, then validate the route

Agent stacks need reliable action calls and predictable output formats. Those features usually matter more than raw model popularity when you build repeatable workflows.

Data source and freshness

Catalog-backed, not a static price sheet

TVP refreshes this page from the live OpenRouter model catalog. This render used 428 public model records and was synchronized Jul 14, 2026, 9:34 PM UTC. Pricing, availability, and context values can change.

Verify the exact route before sending production traffic, then use the linked model and provider pages as the source for current values. Read the TVP data methodology.

Shortlist

Top live candidates right now

x-ai

xAI: Grok 4.20

Grok 4.20 is a reasoning model from xAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering...

Context2,000,000
Input$1.25
Output$2.50

2,000,000 token context, tool support, and structured workflows make this a strong agent candidate.

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  • tools
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Model detailsProvider page
openai

OpenAI: GPT-5.6 Luna

GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume, latency-sensitive tasks such as chat, classification, and lightweight agentic workflows, providing capable reasoning for...

Context1,050,000
Input$1.00
Output$6.00

1,050,000 token context, tool support, and structured workflows make this a strong agent candidate.

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  • tools
  • structured
Model detailsProvider page
openai

OpenAI: GPT-5.6 Luna Pro

GPT-5.6 Luna Pro is the same underlying model as [GPT-5.6 Luna](TVP catalog), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#reasoning-mode

Context1,050,000
Input$1.00
Output$6.00

1,050,000 token context, tool support, and structured workflows make this a strong agent candidate.

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  • tools
  • structured
Model detailsProvider page
openai

OpenAI: GPT-5.4

GPT-5.4 is OpenAI’s latest frontier model, unifying the Codex and GPT lines into a single system. It features a 1M+ token context window (922K input, 128K output) with support for...

Context1,050,000
Input$2.50
Output$15.00

1,050,000 token context, tool support, and structured workflows make this a strong agent candidate.

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  • tools
  • structured
Model detailsProvider page
openai

OpenAI: GPT-5.6 Terra

GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic...

Context1,050,000
Input$2.50
Output$15.00

1,050,000 token context, tool support, and structured workflows make this a strong agent candidate.

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  • image
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  • tools
  • structured
Model detailsProvider page
FAQ

What buyers usually ask

Why are tools and structured output the main signals here?

Agent stacks need reliable action calls and predictable output formats. Those features usually matter more than raw model popularity when you build repeatable workflows.

Can an agent model also be a good coding model?

Yes. Many strong coding models also do well in agents because both workloads benefit from reasoning, tool use, and larger context windows.

Next step

Use the guide, then validate the route in live TVP data.

TVP keeps the shortlist connected to the current catalog, provider coverage, and token pricing so buyers can move from research to routing without starting over.

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