Grok 4.3: Benchmarks, Pricing & Context Window
Grok 4.3 is a language model from xAI, released in May 2026, with a 1M-token context window, and pricing from $1.25/M input and $2.50/M output.
Grok 4.3 is xAI's newest flagship general-purpose model. xAI describes it as the most intelligent and fastest model it has built, with a 1 million token context window, reasoning support, function calling, structured outputs, prompt
Grok 4.3 benchmarks
Capability tiers
Standing within each category, adjusted for leaderboard depth.
Real tasks performance
High-confidence performance for Grok 4.3 across real-world prompt categories. Only 95% intervals at most 4 points wide are shown.
Performance by conversation depth
How Grok 4.3 holds up as conversations get longer.
Quality Tracker
Grok 4.3 Performance Across Datasets
Scores sourced from the model's scorecard, paper, or official blog posts
llm-stats.com - Sun Sep 13 2026Grok 4.3 pricing
Providers
Grok 4.3 starts at $1.25 per million input tokens and $2.50 per million output tokens via xAI.
| Provider | Input $/M | Cached input $/M | Output $/M | Context in / out | TTFT p95 s | Output p5 c/s | Modalities in / out |
|---|---|---|---|---|---|---|---|
 xAI | $1.25 | — | $2.50 | 1.0M/— | — | — | / |
Cached input is the discounted price for prompt tokens served from a provider cache. TTFT is time to first token. Output is characters per second; p5 is the sustained floor exceeded by 95% of observed requests.
Grok 4.3 context window
Input and output token limits for Grok 4.3, plus how it ranks on long-context understanding.
Try now
huggleMake it with
Grok 4.3.
Grok 4.3 latency
Grok 4.3 time to first token, sustained output throughput, and failed-request rate from live model usage over the trailing 7 days.
Grok 4.3 examples
Recent arena outputs from Grok 4.3, picked from the highest-ranked matchups.
Grok 4.3 license
Grok 4.3 is a proprietary model available under its provider's product and API terms.
- License
- Proprietary
- Hosted access
Proprietary license - usage restrictions apply
Grok 4.3 resources
Official sources for Grok 4.3: provider documentation, official playground, official launch post.
Grok 4.3 vs other models
The most-compared alternatives to Grok 4.3 are Qwen3.7-Plus, MiMo-V2.5, Nemotron 3 Ultra (550B A55B). Open any pair side-by-side for benchmarks, pricing, context, and latency.
Models like Grok 4.3
Models ranked just above and below Grok 4.3 by LLM Stats score.
FAQ
Common questions about Grok 4.3.