Grok 4.3
Grok 4.3 by xAI (SpaceXAI): League Score, pricing, context window and sourced benchmarks — the full tracked record.
74 Closed $1.25 / $2.50 per 1M 1M context
League positions: #13 overall · #13 Reasoning Division · #6 Value Division. Score coverage: 25% of components measured. Count tokens & cost for Grok 4.3 · Estimate a workload cost
Agent-ready: this model is tracked with agentic strengths. See the AI Agents section for the products and frameworks that put models like this to work.
Specifications & pricing
| Maker | xAI (SpaceXAI) — lab profile |
| Family | Grok 4 |
| Released | Apr 30, 2026 |
| Status | Current |
| Weights | Closed / proprietary API |
| License | Proprietary |
| Knowledge cutoff | Not published |
| Context window | 1,000,000 tokens |
| Max output | — |
| Modalities in | text, image |
| Modalities out | text |
| API price (input) | $1.25 per 1M tokens |
| API price (output) | $2.50 per 1M tokens |
| Cached input | $0.20 per 1M |
| Blended (3:1 in:out) | $1.56 per 1M |
| Pricing source | Official pricing page (checked Oct 14, 2026) |
| Output speed | 151.8 tokens/sec — Artificial Analysis, Oct 14, 2026 |
| API access | xAI API |
Benchmark results
| Benchmark | Score | Source | Date | Link |
|---|---|---|---|---|
| GPQA Diamond | 90.1 / 100 | BenchLM GPQA leaderboard | Oct 14, 2026 | Source |
| MMLU-Pro | 85.8 / 100 | BenchLM MMLU-Pro (Vals AI mirror) | Oct 14, 2026 | Source |
How its League Score is built
| Component | Raw | Normalised | Weight | Date | Link |
|---|---|---|---|---|---|
| GPQA Diamond | 90.1 | 74.3 | 15% | Oct 14, 2026 | Source |
| MMLU-Pro | 85.8 | 72.8 | 10% | Oct 14, 2026 | Source |
Normalised 0–100 against the tracked field; missing components redistribute their weight. Full rules on the methodology page.
Closest rivals
- Grok 4.3 vs GPT-5.6 Terra — full comparison or compare any pair
- Grok 4.3 vs Claude Sonnet 5 — full comparison or compare any pair
- Grok 4.3 vs DeepSeek V4.1 Flash — full comparison or compare any pair
FAQ
How much does Grok 4.3 cost?
Grok 4.3 costs $1.25 per 1M input tokens and $2.50 per 1M output tokens on the first-party API (checked Oct 14, 2026).
What is the context window of Grok 4.3?
Grok 4.3 accepts up to 1,000,000 tokens of context.
Is Grok 4.3 open source?
No — Grok 4.3 is a closed model available through xAI (SpaceXAI)’s API and products.
Data verified Oct 14, 2026. Spotted an error? Every figure above links to its source.