xAI
Best Overall
Coding and engineering model with 500K context, image input, tool calling, and configurable reasoning.
At a glance
API model ID: grok-4.5
Capabilities & boundaries
Tool support requires the appropriate API integration; a supported tool is not automatically active in every chat.
Reasoning cannot be disabled. Use low, medium or high as distinct effective levels. Although the model card lists xhigh, the dedicated reasoning guide says xhigh requests on Grok 4.5 are treated as high. This guide preserves that caveat instead of promising an extra level of reasoning.
Unsupported settings: none.
Put it to work
Original examples from EZ Ai Assist. Adapt these to your task and the features available in your workspace.
Workflow 01
Constrain the fix and protect existing behavior.
Review this form component, its validation rules and the failing example. Identify the specific bug and propose the smallest patch that fixes it without changing the visual design or unrelated behavior. Explain empty, malformed and boundary-value cases. Add focused test cases and distinguish tests you actually ran from tests you recommend running.
Workflow 02
Ask for concrete counterexamples and a bounded correction.
Check this algorithm against the specification below. Work through the supplied examples and construct small counterexamples for edge cases. Explain any correctness or complexity problem, then propose a minimal correction with a short proof sketch and a test matrix. If the specification is ambiguous, state the ambiguity before choosing an interpretation.
Workflow 03
Separate measured results from plausible explanations.
Using only the experiment plan, measurements and notes I provide, summarize the result and assess whether the evidence supports the original hypothesis. Identify missing controls, measurement uncertainty and alternative explanations. Recommend one next experiment that would most reduce uncertainty. Do not invent observations or treat correlation as proof of cause.
Developer reference
These are global xAI API reference prices, not EZ Ai Assist subscription prices.
View EZ Ai Assist plans| Token type | < 200,000prompt tokens | ≥ 200,000prompt tokens |
|---|---|---|
| Input | $2.00 | $4.00 |
| Cached input | $0.30 | $0.60 |
| Output | $6.00 | $12.00 |
| Usage | Rate and unit |
|---|---|
| Web Search | $5.00per 1,000 calls |
| X Search: posts | $5.00per 1,000 posts fetched |
| X Search: profiles | $10.00per 1,000 profiles fetched |
| Code execution | $5.00per 1,000 calls |
Common questions
Its documented focus is coding, agentic software and engineering tasks. Give it a specific objective, relevant files and a validation boundary. Maintaining an evaluated workflow is different from assuming it is the best choice for every new task.
The card lists 500,000 tokens of context; the model overview lists a February 1, 2026 knowledge cutoff. A maximum output ceiling is not verified here. Current facts should come from supplied evidence or enabled search, not assumed training knowledge.
The model card lists xhigh, but the dedicated reasoning guide states that Grok 4.5 maps it to high. Treat low, medium and high as distinct effective choices unless xAI resolves the discrepancy. High is the documented default, and reasoning cannot be disabled.
The API accepts images and text and lists function calling and structured outputs. Search and execution tools require configuration. Image understanding is not native image generation, and API capability does not establish that a tool is connected in the app.
The published rate is $0.30 per million cached-input tokens below 200,000 prompt tokens, and $0.60 at or above that threshold. Those are 4.5-specific rates, not the $0.50/$1 rates of 4.6 and 4.7. Only actual cache-served usage receives the discount.
The model card says Batch API is unsupported. Similar API shapes do not imply identical parameters: xAI reasoning models reject presencePenalty, frequencyPenalty and stop. Verify the SDK, endpoint and settings before integrating.
No. The guide documents xAI reference behavior and prices. Check EZ Ai Assist for model access, available controls and plan terms. The app may expose a different subset of tools or use different limits from the provider API.
Check the source
Specifications and API prices checked on . Example prompts and workflow advice are editorial guidance from EZ Ai Assist.
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