SpaceXAI: Grok 4.5

xAI (Grok)

grok/grok-4.5

Grok 4.5 is a model from SpaceXAI with frontier performance on coding, knowledge work, and STEM.

Context

500K

Input /1M

$2.00

Output /1M

$6.00

Latency (TTFT)

664ms

Pricing

Per 1M tokens, in USD

Input$2.00

Output$6.00

Cache read$0.30

Specs

text inimage infile intext out

TokenizerGrok

Max output tokens450,000

Supported parameters

include_reasoninglogprobsmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstemperaturetool_choicetoolstop_logprobstop_p

Where it ranks on price

Against 157 routable models

Input$2.00

Cheaper than 17% of routable models

Output$6.00

Cheaper than 24% of routable models

Benchmarks

Intelligence39.1

Coding72.4

Agentic42.1

Composite scores (0–100) from Artificial Analysis, via OpenRouter's model catalog.

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-4.5",
    "messages": [{ "role": "user", "content": "Say hi in five words." }]
  }'

Models

SpaceXAI: Grok 4.5

xAI (Grok)

grok/grok-4.5

Grok 4.5 is a model from SpaceXAI with frontier performance on coding, knowledge work, and STEM.

Context

500K

Input /1M

$2.00

Output /1M

$6.00

Latency (TTFT)

664ms

Pricing

Per 1M tokens, in USD

Input$2.00

Output$6.00

Cache read$0.30

Specs

text inimage infile intext out

TokenizerGrok

Max output tokens450,000

Supported parameters

include_reasoninglogprobsmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstemperaturetool_choicetoolstop_logprobstop_p

Where it ranks on price

Against 157 routable models

Input$2.00

Cheaper than 17% of routable models

Output$6.00

Cheaper than 24% of routable models

Benchmarks

Intelligence39.1

Coding72.4

Agentic42.1

Composite scores (0–100) from Artificial Analysis, via OpenRouter's model catalog.

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-4.5",
    "messages": [{ "role": "user", "content": "Say hi in five words." }]
  }'