Grok 4.5
grok-4.5Grok 4.5 by xAI, with Vision, Function Calling, Reasoning, Prompt Caching, Response Schema, Streaming. Via WandAPI, Input (prompt) costs 2 Credits / M tokens, 85% below list price.
Capabilities
Listed exactly as the catalog flags them, including what this model does not support.
Vision
Natively multimodal: captioning, classification, visual Q&A, chart and screenshot understanding. Images are converted to tokens at the input rate.
Function Calling
Connect the model to external tools and APIs: it decides when to call which function and with what arguments, your code runs it. Force or forbid calls with tool_choice.
Reasoning
The model thinks before answering, which markedly improves multi-step planning and reasoning for coding, math and data analysis. Thinking tokens bill at the output rate.
Prompt Caching
Repeated prefixes (system prompts, long documents) hit the cache: reads cost far less than input, writes are priced by retention time.
Response Schema
Constrain output to a JSON Schema you provide for predictable, type-safe results without parsing free text.
Streaming
Tokens arrive over SSE as they are generated; the first frame is forwarded immediately with no buffering. Claude Code, Codex and similar tools depend on this.
AudioNot supported
Audio input or speech output.
VideoNot supported
Video input understanding or video generation.
File InputNot supported
Upload PDFs and other documents directly; the model reads the whole document with native vision.
Web SearchNot supported
Vendor-hosted live web retrieval; the model decides when to search and cites sources.
RealtimeNot supported
Bidirectional low-latency voice / text sessions over WebSocket.
SessionNot supported
Server-side multi-turn context (e.g. previous_response_id in Responses) so you need not resend history.
MediaNot supported
Image / video / music generation endpoints.
Multipart FormNot supported
multipart/form-data file-upload requests.
Binary ResponseNot supported
Endpoints that return raw audio / image bytes.
Full price list
List price → WandAPI price per channel, every pricing dimension, nothing hidden.
| Item | Unit | xAI list price | Grok Official ×185% off |
|---|---|---|---|
| Input (prompt) | per 1M tokens | 2 Credits | |
| Output (completion) | per 1M tokens | 6 Credits | |
| Cache read | per 1M tokens | 0.5 Credits | |
| Web search (general) | per 1K calls | 5 Credits |
“Off” is computed at 1 Credit = ¥1 and today’s rate: 1 − channel multiplier × (1 Credit in the list currency). Standard(≥200K): when input exceeds 200,000 tokens, billed at Cache read ×2、Output (completion) ×2、Input (prompt) ×2; stacks with any channel.
FAQ
How much does the Grok 4.5 API cost?
Via WandAPI, Input (prompt) costs 2 Credits / M tokens, with 1 Credit = ¥1. That is 85% below the xAI list price.
Does Grok 4.5 support function calling and structured outputs?
Function calling with tool_choice control is supported; structured outputs (JSON Schema) are supported.
One API key for Grok 4.5 and 30+ models
Free credits on sign-up, pay as you go, no monthly fee.