grok-4-fast-reasoning
xai · chat model
Input
$0.2000 / 1M tokens
Output
$0.5000 / 1M tokens
Cached input
$0.0500 / 1M tokens
Context
2.0M
Pricing
| Item | Raw value (per token) | Normalized |
|---|---|---|
| Input | 2e-7 | $0.2000 / 1M tokens |
| Output | 5e-7 | $0.5000 / 1M tokens |
| Cached input | 5e-8 | $0.0500 / 1M tokens |
| Embedding | 2e-7 | $0.2000 / 1M tokens |
Token limits
Context window
2.0M
Max input tokens
2.0M
Max output tokens
2.0M
Max tokens
2.0M
Capabilities
| Capability | Supported |
|---|---|
| Vision | No |
| Function calling | Yes |
| Parallel function calling | No |
| Tool choice | Yes |
| Prompt caching | Yes |
| Reasoning | No |
| Response schema | No |
| System messages | No |
| Audio input | No |
| Audio output | No |
| Web search | Yes |
| PDF input | No |
| Video input | No |
Similar models
Models with comparable pricing in the same mode (chat).
| Model | Provider | Input | Output | Context | Coding | Features |
|---|---|---|---|---|---|---|
| grok-4-fast-non-reasoning | azure_ai | $0.2000 / 1M tokens | $0.5000 / 1M tokens | 131.1K | N/A | Tools |
| grok-4-fast-reasoning | azure_ai | $0.2000 / 1M tokens | $0.5000 / 1M tokens | 131.1K | N/A | Tools |
| grok-4-1-fast-non-reasoning | azure_ai | $0.2000 / 1M tokens | $0.5000 / 1M tokens | 131.1K | N/A | Tools |
| grok-4-1-fast-reasoning | azure_ai | $0.2000 / 1M tokens | $0.5000 / 1M tokens | 131.1K | N/A | Tools Reasoning |
| grok-4.1-fast-non-reasoning | Vertex AI | $0.2000 / 1M tokens | $0.5000 / 1M tokens | 2.0M | N/A | Vision Tools |
| grok-4.1-fast-reasoning | Vertex AI | $0.2000 / 1M tokens | $0.5000 / 1M tokens | 2.0M | N/A | Vision Tools Reasoning |
Sources
| Pricing source | LiteLLM model cost map |
| Synced at | 2026-05-27 |
| Manual review | Not reviewed |
Raw LiteLLM fields
{
"cache_read_input_token_cost": 5e-8,
"input_cost_per_token": 2e-7,
"input_cost_per_token_above_128k_tokens": 4e-7,
"litellm_provider": "xai",
"max_input_tokens": 2000000,
"max_output_tokens": 2000000,
"max_tokens": 2000000,
"mode": "chat",
"output_cost_per_token": 5e-7,
"output_cost_per_token_above_128k_tokens": 0.000001,
"source": "https://docs.x.ai/docs/models",
"supports_function_calling": true,
"supports_prompt_caching": true,
"supports_tool_choice": true,
"supports_web_search": true
}