XAI MODEL GUIDE
Grok 4.5 API
xAI's Grok 4.5 model for reasoning, coding, tool use, and text-and-image workflows.
Choosing and integrating
Grok 4.5 API pricing breakdown
Grok 4.5 (grok-4.5) is billed by token usage. Prices below are USD per 1M tokens. LLMFly AI rates already include the 0.4x group multiplier; do not apply it again. Provider reference prices are separate. These rates come from the site's Model Plaza snapshot; confirm live catalog and account rates before calling.
Example: a request with 10,000 uncached input tokens and 1,000 output tokens costs approximately $0.0104 in LLMFly AI token charges. This excludes cache writes, tools, retries, and other additional fees.
- Platform and provider prices use their own input-token tiers. Do not apply provider long-context multipliers to platform prices.
- Not listed does not mean free. Account for cache reads, cache writes, and uncached input in their respective billing categories.
- Token cost = tokens in each billing category × its price per million ÷ 1,000,000. Add tools and other charges separately.
| Price source | Input tokens per request | Input | Output | Cache write | Cache read | 1h cache write |
|---|---|---|---|---|---|---|
| LLMFly AI | 0 < tokens ≤ 199,999 | $0.8 | $2.4 | Not listed | $0.12 | Not listed |
| LLMFly AI | 199,999 < tokens | $1.6 | $4.8 | Not listed | $0.24 | Not listed |
| Provider reference | 0 < tokens ≤ 199,999 | $2 | $6 | Not listed | $0.3 | Not listed |
| Provider reference | 199,999 < tokens | $4 | $12 | Not listed | $0.6 | Not listed |
Pricing tiers and additional charges
Grok 4.5 vendor long-context pricing is selected from input tokens in one request. Search and other tools can add charges. Platform rates and vendor references must be calculated separately.
Grok 4.5 capabilities and workloads
xAI's Grok 4.5 model for reasoning, coding, tool use, and text-and-image workflows.
Long-context reasoning, coding, research, and tool-using agents.
- Function calling, structured output, and server-side tools on supported xAI interfaces.
- A 500K context window for long documents, code, and agent state.
Limits to check before migration
- Vendor pricing changes above 200K input tokens; select the tier from one request, not aggregate traffic.
- Tool and search availability must be validated on the LLMFly AI route.
Comparing Grok 4.5 with sibling models
Compare the exact API ID, vendor lifecycle, context, maximum output, tools, and thinking controls first. Then measure pass rate, latency, tokens, and total cost on the same tasks. The Grok 4.5 version or tier label alone does not prove better results.
Use the exact model ID when connecting
Set the model field to grok-4.5; do not infer its spelling from the display name. Configure the API address and key using the access documentation; the snippet only shows the model field, not a complete request.
- Send a minimal text request and inspect the response and usage.
- Test streaming, tool calls, and structured output separately if your application needs them.
- Check retry behavior and spending limits before increasing traffic.
{
"model": "grok-4.5"
}Vendor capability versus gateway access
Grok 4.5's specifications above were checked in vendor documentation. No paid inference requests or account-route modality, tool, or beta-parameter tests were run in this review. Validate your application before launch; documentation review is not end-to-end compatibility certification.
Frequently asked questions
What should I put in the model field?
Use the exact ID grok-4.5, not the display name.
How is the discount calculated?
The current 0.4x multiplier is applied to the base rate, giving 60% off the catalog's official reference. Amounts are shown per million tokens.
Do these prices include every possible fee?
Not necessarily. Check cache-write duration, tools, and other route charges separately. Use the full pricing table and actual usage records to reconcile a bill.
What are the context and output limits?
Vendor documentation lists 500,000 context and Not publicly capped for text output maximum output; confirm gateway route limits separately.
Use the Grok 4.5 API
LLMFly AI provides this model. Use the exact ID grok-4.5 and confirm current account pricing in Model Plaza.