Grok 4.3

xAI - grok-4.3

8.4/10

Provisional 0 practitioner reviews Source verified

Data source: This model page uses public provider documentation, pricing/context data, benchmark signals where available, and manual curation. Practitioner reviews are listed separately below and do not change the score until approved.

Context window

1,000,000 tokens

Input price

$1.25/1M

Output price

$2.5/1M

Checked

May 16, 2026

Pricing caveat: xAI lists higher context pricing for requests that exceed 200K tokens.

Decision Notes

Best for

  • - Agents that need a 1M context window and configurable reasoning
  • - Workloads that benefit from xAI tool/search integrations
  • - Cost-aware general agents where output pricing matters

Avoid when

  • - Prompts above 200K tokens unless you account for higher-context pricing
  • - Teams that have not validated xAI regional availability and rate limits

Cost example

1M input tokens plus 200K output tokens costs about $1.75 before higher-context pricing.

Dimension Breakdown

Tool Calling 8/10

Reliability of function/tool calling — correct schema adherence and parameter extraction

Cost Efficiency 8/10

Price per token relative to output quality for agent tasks

Latency 8/10

Response time — time to first token and total generation time under load

API Reliability 8/10

Uptime, rate limit headroom, and error rates in production

Context Quality 10/10

Long-context coherence and instruction following over turns

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Top Use Cases

Coding RAG General

Summary

xAI model with 1M context and low output pricing for a flagship-class model. The main caveat is higher-context pricing above 200K tokens.

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Last updated: May 16, 2026