Grok 4.20 Beta Reasoning (0309) API

Model details

Context window

2M tokens

Max output

30K tokens

Input

Text, images

Output

Text

Capabilities

Reasoning, Vision, Tool calling, Streaming, JSON output

Interfaces

OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses

Why teams pick it

• Grok 4.20 Beta Reasoning (0309) for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.

Call Grok 4.20 Beta Reasoning (0309)

Grok 4.20 Beta Reasoning (0309) answers on any of the APIs below — pick the one your code already speaks and just swap in your Inferray key.

curl https://api.inferray.com/v1/chat/completions \
  -H "Authorization: Bearer inferray_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "grok-4-20-beta-0309-reasoning",
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ]
}'

curl https://api.inferray.com/v1/messages \
  -H "Authorization: Bearer inferray_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "grok-4-20-beta-0309-reasoning",
  "max_tokens": 1024,
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ]
}'

curl https://api.inferray.com/v1/responses \
  -H "Authorization: Bearer inferray_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "grok-4-20-beta-0309-reasoning",
  "input": "Hello"
}'

Use Grok 4.20 Beta Reasoning (0309) in your tools

Every coding agent below has a setup guide. Set the model to grok-4-20-beta-0309-reasoning.

• Claude Code
• Codex
• opencode
• Cline
• Roo Code
• Aider
• Continue

More from xAI

Alternatives to Grok 4.20 Beta Reasoning (0309)

• Qwen3.8 MaxAlibaba's flagship MoE, built for coding and long-horizon agents.Alibaba
• Fugu MaxFugu Max for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.Sakana AI
• Mistral Medium 3.5Mistral Medium 3.5 for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.Mistral

Questions about this model

How much does the Grok 4.20 Beta Reasoning (0309) API cost?

Grok 4.20 Beta Reasoning (0309) costs $2 per 1M input tokens and $6 per 1M output tokens on Inferray, and cached input is $0.2 per 1M. That is the list price, with no gateway fee on top.

Is there a free tier for Grok 4.20 Beta Reasoning (0309)?

No. You add credit and pay Grok 4.20 Beta Reasoning (0309)'s list rate for each request — seats, projects, and API keys are free, and pay-as-you-go credit never expires.

Am I charged for failed requests?

No. A request that fails without returning a result is not billed. If a response fails part-way, the tokens already processed before the failure are charged.

Is Grok 4.20 Beta Reasoning (0309) included in Token Plans?

No. Grok 4.20 Beta Reasoning (0309) is pay-as-you-go only; Token Plans cover the other text models in the catalog.

Can I use Grok 4.20 Beta Reasoning (0309) in Claude Code?

Yes. Set ANTHROPIC_BASE_URL to https://api.inferray.com, ANTHROPIC_AUTH_TOKEN to your Inferray key, and ANTHROPIC_MODEL to grok-4-20-beta-0309-reasoning. The same key works in Codex, opencode, Cline, and other agents.

Does Grok 4.20 Beta Reasoning (0309) support tool calling and vision?

Grok 4.20 Beta Reasoning (0309) supports tool calling, image input, reasoning, JSON output and streaming on Inferray.

Is it the real Grok 4.20 Beta Reasoning (0309)?

Yes. A request for grok-4-20-beta-0309-reasoning is answered by Grok 4.20 Beta Reasoning (0309) from xAI, billed at its published list price. Inferray never substitutes a different or smaller model.