SpaceXAI: Grok 4.20

xAI (Grok)

grok/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...

Context

2M

Input /1M

$1.25

Output /1M

$2.50

Latency (TTFT)

509ms

Pricing

Per 1M tokens, in USD

Input$1.25

Output$2.50

Cache read$0.20

Specs

text inimage infile intext out

TokenizerGrok

Max output tokens1,800,000

Supported parameters

include_reasoninglogprobsmax_tokensreasoningresponse_formatseedstructured_outputstemperaturetool_choicetoolstop_logprobstop_p

Where it ranks on price

Against 157 routable models

Input$1.25

Cheaper than 30% of routable models

Output$2.50

Cheaper than 46% of routable models

Benchmarks

No third-party benchmark data available for this model yet.

Call this model

Swap in your Mizan key — the request/response bodies are OpenAI chat-completion shaped.

cURL

curl https://api.app-mizan.com/v1/chat/completions \
  -H "Authorization: Bearer mizan_rt_..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "grok/grok-4.20",
    "messages": [{ "role": "user", "content": "Say hi in five words." }]
  }'

Models

SpaceXAI: Grok 4.20

xAI (Grok)

grok/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...

Context

2M

Input /1M

$1.25

Output /1M

$2.50

Latency (TTFT)

509ms

Pricing

Per 1M tokens, in USD

Input$1.25

Output$2.50

Cache read$0.20

Specs

text inimage infile intext out

TokenizerGrok

Max output tokens1,800,000

Supported parameters

include_reasoninglogprobsmax_tokensreasoningresponse_formatseedstructured_outputstemperaturetool_choicetoolstop_logprobstop_p

Where it ranks on price

Against 157 routable models

Input$1.25

Cheaper than 30% of routable models

Output$2.50

Cheaper than 46% of routable models

Benchmarks

No third-party benchmark data available for this model yet.

Call this model

Swap in your Mizan key — the request/response bodies are OpenAI chat-completion shaped.

cURL

curl https://api.app-mizan.com/v1/chat/completions \
  -H "Authorization: Bearer mizan_rt_..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "grok/grok-4.20",
    "messages": [{ "role": "user", "content": "Say hi in five words." }]
  }'