Grok 4.5

xAI's flagship reasoning model for multimodal chat, tool use, and structured outputs.

Input price
$2.20
Output price
$6.60
Context
500K
Max output
128K
Modalities
InputTextImageOutputText
154 (#37 of 89)
1448
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Released
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Knowledge cutoff
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Try in ChatCompare

Providers

Providers that serve this model. With Auto, each request goes to the best available provider. Prices in USD per 1M tokens; stats cover the last 30 days.

Pricing

All prices for this model, by service tier.

Prompt ≤ 200K tokens

Input
$2.20
per 1M tokens
Output
$6.60
per 1M tokens
Cache read
$0.33
per 1M tokens
Reasoning output
$6.60
per 1M tokens
Web search
$0.0055
per request

Prompt > 200K tokens

Input
$4.40
per 1M tokens
Output
$13.20
per 1M tokens
Cache read
$0.66
per 1M tokens
Reasoning output
$13.20
per 1M tokens
Web search
$0.0055
per request

Make a request

Set your provider preferences, then copy the request. It reads your API key from OHMYGPT_API_KEY.

Later turns reuse the provider’s prompt cache, which can lower cost and latency.

curl https://api.ohmygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $OHMYGPT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "xai/grok-4.5",
    "messages": [
      {
        "role": "user",
        "content": "Hello"
      }
    ]
  }'

Similar models

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  • Better value: more capable, lower price
  • Pareto frontier
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Capability scores are from Epoch AI’s Epoch Capabilities Index (CC BY 4.0, as of 2026-11-02), which combines dozens of benchmarks with GPT-5 set at 150. epoch.ai/eci

Price: our current input price per 1M tokens in USD, lowest across channels. Dated snapshots and resold copies of the same model are merged into one point; free models are not shown.

Shaded area: capability above and price below the median of all models. Pareto frontier: no other model is both cheaper and more capable.

Grok 4.5This model
154
Input
$2.20
Output
$6.60
Claude Sonnet 5.5
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Input
$2.20
Output
$11.00
DeepSeek R1 Distill Llama 70B
—
Input
$2.20
Output
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Pixtral Large 25.02
—
Input
$2.20
Output
$6.60
Moonshot V1 128K
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Input
$2.20
Output
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Human preference ratings are from the LMArena Text Arena (CC BY 4.0, as of 2026-10-28): Elo ratings from blind votes, on a different scale from capability scores. lmarena.ai/leaderboard/text