Grok 4.6
Grok 4.6 is an AI model released by SpaceXAI on Wednesday, Aug 12 2026, 35 days after Grok 4.5. Benchmark results (shown below) cover FrontierCode v1.1 (Extended), APEX-SWE, Terminal-Bench 3.0, APEX-Agents, AA Intelligence Index, AA-Briefcase, and 4 more.
Benchmarks
About Grok 4.6
Grok 4.6, released August 12, 2026, was xAI's bet that post-training alone could deliver a flagship upgrade. It reused the 1.5-trillion-parameter base model of Grok 4.5, five weeks its senior, and poured the gains into supervised fine-tuning on regenerated trajectories and wide-ranging reinforcement learning across engineering and domain-specific environments. At release it scored 61 on the Artificial Analysis Intelligence Index — up from 56 for Grok 4.5, and level with GPT-5.6 Sol at the time — while priced at $2 per million input tokens and $6 per million output.
xAI pitched it at long-running agents and knowledge work rather than raw coding leaderboards. At launch it posted a GDPval-AA v2 Elo of 1753, 15.8% on Harvey's Legal Agent Benchmark — the top score in xAI's own launch comparison — and 69.9% on CursorBench v3.2, within a point of Claude Fable 5's published number at the time. Terminal work stayed a relative weakness, at 26% on the much harder Terminal-Bench 3.0. Elon Musk said the larger Grok 4.7 would follow within weeks, trading some serving speed for capability.
Grok 4.6 — frequently asked questions
- When was Grok 4.6 released?
- Grok 4.6 was released by SpaceXAI on Wednesday, Aug 12 2026.
- Who made Grok 4.6?
- Grok 4.6 was built by SpaceXAI. Elon Musk's AI company building the Grok series of models. Founded in 2023 as xAI, now part of SpaceX.
- What benchmark scores did Grok 4.6 get?
- Grok 4.6 reports 10 tracked benchmark scores — CursorBench v3.2: 69.9%; DeepSWE 1.1: 65.9%; FrontierCode v1.1 (Extended) (extended split): 61.3%; APEX-SWE: 56.4%; Terminal-Bench 3.0: 26%; APEX-Agents: 57.5%; Harvey's Legal Agent Benchmark: 15.8%; AA Intelligence Index: 61; GDPval-AA v2: 1753; AA-Briefcase: 1577. Scores are the figures published at release by SpaceXAI. It holds the best score among all models tracked here on FrontierCode v1.1 (Extended) (extended split), APEX-SWE, Terminal-Bench 3.0, APEX-Agents, AA Intelligence Index and AA-Briefcase.
- Is Grok 4.6 open source?
- No. Grok 4.6 is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.
- What came before and after Grok 4.6?
- SpaceXAI's previous tracked release was Grok 4.5 on Jul 8 2026, 35 days earlier. It is the most recent SpaceXAI model tracked on AI Release Tracker.