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Grok 4.3

Frontier

xAI's flagship — frontier quality at a surprisingly low price, with a 1M context.

xAI
Maker
84/100
Overall
62
Value score
$1.63
Blended /1M
1M
Context
Proprietary
Weights
Pricing: $1.25 in · $2.50 out / 1M tokens · synced from OpenRouter · updated 2026-06-22

Scorecard

Output Quality8.7/10 · 76% community
Agentic Ability8.2/10 · 73% community
Speed8.0/10 · 73% community
Value for $8.6/10 · 75% community
Reliability8.4/10 · 74% community

Grok 4.3 is xAI's flagship and one of the better-value frontier models: strong reasoning and tool use at a price well below the OpenAI and Anthropic flagships, with a 1M-token context. A solid all-rounder for agents that want frontier capability without the frontier bill.

Strengths
  • Frontier-ish quality at mid-tier price
  • 1M context
  • Fast for its class
Trade-offs
  • Tool-use polish behind Claude/GPT
  • Smaller ecosystem

Agents that run Grok 4.3 well

Frontier capability on a tighter budget.

Best model for ClineBest model for AiderBest model for CursorBest model for OpenCodeBest model for OpenClawBest model for Hermes

Grok 4.3 FAQ

Is Grok 4.3 good for AI agents?
Frontier capability on a tighter budget. On our editorial scoring it rates 8.2/10 for agentic ability and 8.7/10 for output quality. Frontier-ish quality at mid-tier price.
How much does Grok 4.3 cost?
Via OpenRouter, Grok 4.3 is priced at $1.25 in · $2.50 out / 1M tokens — a blended rate of about $1.63 per 1M tokens for typical input-heavy agent use.
What is Grok 4.3's context window?
Grok 4.3 has a 1M-token context window — large enough to hold sizeable codebases or document sets in a single run. xAI is the maker.
Can I self-host Grok 4.3?
No — Grok 4.3 is a proprietary, hosted-only model from xAI. You access it through an API (e.g. OpenRouter) rather than running the weights yourself.
What are the downsides of Grok 4.3?
The main trade-offs: tool-use polish behind claude/gpt; smaller ecosystem. It's strongest for frontier capability on a tighter budget.

Grok 4.3 compared

Grok 4.3 vs Opus 4.8Grok 4.3 vs GPT-5.5Grok 4.3 vs Gemini 3.1 ProGrok 4.3 vs GLM 5.2Grok 4.3 vs Qwen3.7 MaxGrok 4.3 vs DeepSeek V4 ProGrok 4.3 vs Kimi K2.6Grok 4.3 vs Grok 4.20

The model is half the story — the agent is the other half

The model picks the moves; the agent runs the loop, the tools, and the guardrails. Once you've chosen a model, see which agent gets the most out of it.

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