x-ai

SpaceXAI: Grok 4.20

x-ai/grok-4.20

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

text

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Input / 1M tokens$1.25

Output / 1M tokens$2.5

Context window2,000,000

Maximum output1,800,000

Provider-supported parameters

These are upstream capabilities. Jevrouter supports the subset described in the API contract; chat input is currently text only.

include_reasoninglogprobsmax_tokensreasoningresponse_formatseedstructured_outputstemperaturetool_choicetoolstop_logprobstop_pstreamdeveloper_role

Capabilities are imported from OpenRouter’s catalog. This does not mean every model has been independently tested by Jevrouter.

Catalog updated: 2026-09-22T09:51:50.338Z · Price version: cmubxr1h007ngjn0z3qkoffk0:3

Provider pricing fields · USD per indicated unit

{
  "prompt": "0.00000125",
  "completion": "0.0000025",
  "overrides": [
    {
      "prompt": "0.0000025",
      "completion": "0.000005",
      "input_cache_read": "0.0000004",
      "min_prompt_tokens": 200000
    }
  ],
  "web_search": "0.005",
  "input_cache_read": "0.0000002"
}

Make a request

curl --no-buffer https://api.jevrouter.io/v1/chat/completions \
  -H "Authorization: Bearer $JEVROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d @- <<'JSON'
{
  "model": "x-ai/grok-4.20",
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ],
  "max_tokens": 1024
}
JSON

Plan your integration

Connect with the OpenAI Python SDK →Estimate this model’s cost →Budgets, request status and safe retries →

Source: OpenRouter model catalog. Imported descriptions and capabilities are provider declarations, not independent benchmark results. Jevrouter currently uses OpenRouter as its managed upstream.