Calculate the cost of using grok-4-fast-reasoning from Azure for your AI applications
Pricing data last updated:
Mode: Chat
Max: 131,072 tokens
Max: 131,072 tokens
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grok-4-fast-reasoning is a chat model from Azure, one of 190 chat models they offer. It is priced at $0.20 per 1M input tokens and $0.50 per 1M output tokens, ranking 559 out of 2292 chat models by cost and cheaper than 69% of models in this category. grok-4-fast-reasoning supports function calling, web search, structured output — one of only 7 chat models with this combination. It accepts up to 131K input tokens.
Note: Use the interactive calculator above to estimate costs for your specific usage patterns.
Use the maximum token limits shown above to understand the model's capacity. This model can handle up to 131,072 input tokens. The maximum output length is 131,072 tokens.
At $0.20 per 1M input tokens and $0.50 per 1M output tokens, grok-4-fast-reasoning ranks 559 out of 2292 chat models by input cost. It is more affordable compared to the median of $0.55 for chat models, and is cheaper than 69% of models in this category.
grok-4-fast-reasoning is one of 190 Azure chat models, one of only 7 chat models combining function calling, structured output, web search.
| Model | Provider | Input / 1M tokens | Output / 1M tokens | vs grok-4-fast-reasoning |
|---|---|---|---|---|
| gemini-3.1-flash-lite-preview | Google Gemini | $0.25 | $1.50 | +25% |
| gemini-3.1-flash-lite | Google Gemini | $0.25 | $1.50 | +25% |
| gpt-5.4-nano | OpenAI | $0.20 | $1.25 | 0% |
Similar chat models from other providers
Yes. grok-4-fast-reasoning costs $0.20 per 1M input tokens compared to gemini-3.1-flash-lite-preview's $0.25 per 1M input tokens, making it 25% more affordable. Both are chat models and share support for vision, function calling, reasoning, audio input, web search, prompt caching, structured output.
grok-4-fast-reasoning input pricing is $0.20 per 1M tokens, which is 64% below the median of $0.55 for chat models. It ranks 559 out of 2292 chat models by input cost, making it cheaper than 69% of models in this category. For output, it costs $0.50 per 1M tokens compared to the median of $1.50.
Among Azure's 190 chat models, grok-4-fast-reasoning ranks 36 by input cost. Its combination of function calling, structured output, web search is shared by only 6 other chat models.
The most comparable chat models to grok-4-fast-reasoning are: gemini-3.1-flash-lite-preview from Google Gemini ($0.25/1M input tokens); gemini-3.1-flash-lite from Google Gemini ($0.25/1M input tokens); gpt-5.4-nano from OpenAI ($0.20/1M input tokens); gpt-5.4-nano-2026-03-17 from OpenAI ($0.20/1M input tokens). These alternatives were selected based on similar capabilities, pricing, and provider diversity. You can compare any of these models in detail using the Bifrost Model Library.
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grok-4-fast-reasoning is priced based on input and output tokens. Use the interactive calculator at the top of this page to estimate costs for your specific workload. Enter your expected input and output tokens volume and the calculator will show the total cost breakdown. For reference, processing 1M input tokens costs $0.20 and generating 1M output tokens costs $0.50.
