{"schema":"postcutoff/event@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/e/2026-09-21-grok-4-7/","md":"https://postcutoff.com/e/2026-09-21-grok-4-7/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"2026-09-21-grok-4-7","date":"2026-09-21","date_precision":"day","short_title":"SpaceXAI releases Grok 4.7 with a new larger base model and new safeguard stack","deck":null,"takeaway":"On 2026-09-21 SpaceXAI released Grok 4.7, its most capable model for coding and knowledge work, built on a new, larger base model than Grok 4.6 and a longer RL run weighted toward multi-hour tasks.","category":"model-release","category_label":"Model releases","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":[{"n":1,"title":"Introducing Grok 4.7 | SpaceXAI","url":"https://x.ai/news/grok-4-7","type":"official","group":"primary","domain":"x.ai"},{"n":2,"title":"SiliconANGLE - SpaceX launches Grok 4.7 with long-horizon processing, safety upgrades","url":"https://siliconangle.com/2026/09/21/spacex-launches-grok-4-7-with-long-horizon-processing-safety-upgrades/","type":"press","group":"press","domain":"siliconangle.com"},{"n":3,"title":"Unite.AI - SpaceXAI releases Grok 4.7 for coding and knowledge work","url":"https://www.unite.ai/spacexai-releases-grok-4-7-for-coding-and-knowledge-work/","type":"press","group":"press","domain":"unite.ai"},{"n":4,"title":"TestingCatalog - SpaceXAI releases Grok 4.7","url":"https://www.testingcatalog.com/spacexai-releases-grok-4-7-for-coding-and-knowledge-work/","type":"press","group":"press","domain":"testingcatalog.com"}],"official":1,"filed":"2026-09-29","updated":"2026-09-29","orgs":["xAI","SpaceX"],"title":"SpaceXAI releases Grok 4.7 with a new larger base model and new safeguard stack","summary":"On 2026-09-21 SpaceXAI released Grok 4.7, its most capable model for coding and knowledge work, built on a new, larger base model than Grok 4.6 and a longer RL run weighted toward multi-hour tasks. It keeps Grok 4.6's $2/$6 pricing and ships with a new safeguard stack (3.3% risky-prompt pass rate on xAI's HackerBench v0.3).","key_facts":["Released 2026-09-21 in Cursor, Grok Build, the Grok API, third-party coding harnesses, routers and cloud platforms","Price: $2 per 1M input / $6 per 1M output tokens; fast variant at 2x price for 2x output speed","New, larger base model than Grok 4.6; longer RL run on tasks that take many hours","CursorBench 4.0: 46.3%; DeepSWE v1.1 (high effort): 71.0%; Terminal-Bench 4.0: 37.6%; EEBench: 64.0% (xAI)","AA Briefcase v1.1: 1,657; Harvey Legal Agent Benchmark: 19.6%; HealthBench Professional: 56.7% (xAI)","Safety: HackerBench v0.3 - only 3.3% of risky dual-use cyber prompts allowed; LatchBio biosafety: 62.4%","SiliconANGLE: on EEBench (chip design) it beat Fable 5.1 but trailed GPT-6 Astra","Grok Voice Transcribe 2.0 was released the Friday before (per SiliconANGLE)"],"key_numbers":[],"tags":["grok","xai","spacexai","llm","coding","agents","safety"],"science":null,"body_md":"## What happened\n\nJust six weeks after Grok 4.6, SpaceXAI shipped **Grok 4.7** (2026-09-21). xAI says it works longer on difficult tasks\nand checks its own work more carefully. It uses a new, larger base model and a longer reinforcement-learning run\non a harder task mix weighted toward problems that take many hours. Price and speed are unchanged from Grok 4.6.\n\nxAI-reported results include CursorBench 4.0 46.3%, DeepSWE v1.1 71.0% (high effort), Terminal-Bench 4.0 37.6%,\nEEBench 64.0%, AA Briefcase v1.1 1,657, Harvey Legal Agent Benchmark 19.6% and HealthBench Professional 56.7%.\nIt also introduced \"an entirely new safeguard stack\", with xAI claiming its strongest refusal/jailbreak resistance\nyet while keeping legitimate security work unblocked (HackerBench v0.3: 3.3% risky prompts allowed).\n\n## Why it matters\n\nxAI's rapid 4.x cadence (4.5 -> 4.6 -> 4.7 within months) while Grok 5 remains in training shows the lab competing on\nprice-performance for agentic coding rather than waiting for a single giant release. The emphasis on safety\nbenchmarks is also a shift for xAI, which had been criticized for weak safeguards.","disputed":[],"related":[{"id":"2026-08-12-grok-4-6","url":"https://postcutoff.com/e/2026-08-12-grok-4-6/","date":"2026-08-12","date_precision":"day","short_title":"SpaceXAI releases Grok 4.6, matching GPT-5.6 Sol on the AA Intelligence Index","deck":null,"takeaway":"On 2026-08-12 SpaceXAI (xAI after its merger with SpaceX) released Grok 4.6, a flagship model aimed at long-running agents, coding and knowledge work.","category":"model-release","category_label":"Model releases","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":8,"official":6,"filed":"2026-09-29","updated":"2026-09-30","orgs":["xAI","SpaceX"]},{"id":"2026-02-02-spacex-acquires-xai","url":"https://postcutoff.com/e/2026-02-02-spacex-acquires-xai/","date":"2026-02-02","date_precision":"day","short_title":"SpaceX absorbs xAI in a $1.25 trillion merger","deck":null,"takeaway":"It fused a frontier AI lab with the world's dominant launch provider and a large satellite network, giving xAI access to public-market capital (via the June 2026 SpaceX IPO) and a unique compute-in-space thesis.","category":"business","category_label":"Business","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":4,"official":0,"filed":"2026-09-29","updated":"2026-09-29","orgs":["SpaceX","xAI"]}],"people":[],"posts":[{"id":"2026-09-02-musk-grok-4-7-in-ten-days","title":"\"Grok 4.7 comes out in 10 days\"","url":"https://postcutoff.com/p/2026-09-02-musk-grok-4-7-in-ten-days/"}],"videos":[],"models":[],"changes":[{"date":"2026-09-29","type":"filed","text":"Created"}],"provenance":{"agents":[{"model":"Claude Opus 5.5","maker":"Anthropic","tool":"Claude Code"}],"filed":"2026-09-29","run":null,"sources_read":null,"updated":"2026-09-29","human_review":null,"version":{"date":"2026-10-04"}},"gaps":[{"model_id":"gpt-6-astra","name":"GPT-6 Astra","cutoff":"2026-04","days_after":144,"in_training_data":false},{"model_id":"claude-opus-5-5","name":"Claude Opus 5.5","cutoff":"2026-06","days_after":83,"in_training_data":false},{"model_id":"gemini-4-hydrogen","name":"Gemini 4 Hydrogen","cutoff":"2026-03","days_after":174,"in_training_data":false},{"model_id":"grok-4-7","name":"Grok 4.7","cutoff":"2026-05","days_after":113,"in_training_data":false}],"short_url":"https://postcutoff.com/s/spacexai-grok-4-7-new"}