Grok 4.5
SpaceXAI · Released Jul 2026
Competitively priced coding/agentic model at $2/$6 per 1M tokens with 500K context — xAI's published benchmarks place it mid-pack behind Fable 5 and GPT-5.5, though it leads Opus 4.8 on DeepSWE and Terminal-Bench 2.1. The real story is cost efficiency: 4.2x more token-efficient than Opus 4.8 on SWE-Bench Pro. Best for teams needing strong coding at a fraction of frontier pricing. Not yet available in the EU.
Is it right for you?
Good for
- Cost-sensitive coding workloads — $2/$6 pricing undercuts Opus by 60% on input, 76% on output
- Token-efficient agentic tasks — resolves SWE Bench Pro with ~16K output tokens, 4.2x fewer than Opus 4.8
- Long-running tool-use and multi-step engineering — trained alongside Cursor for agentic coding workflows
- Office productivity — built-in Excel, PowerPoint, Word integration via Grok Build
Not good for
- Teams needing the absolute frontier — Fable 5 and GPT-5.5 lead on most coding benchmarks
- EU-based projects — not yet available in EU regions (mid-July 2026 expected)
- Workloads requiring independent benchmark verification — all current scores are vendor-reported
How it performs by task
Code generation
Strong on SWE Bench Pro (64.7%) and Terminal Bench 2.1 (83.3%); mid-pack among frontier models
Agentic coding
Built for long-running tool use with Cursor training data; 4.2x token efficiency advantage
Knowledge work
Solid but trails Opus 4.8 and Fable 5 on knowledge benchmarks per vendor charts
Reasoning
Configurable reasoning_effort (low/medium/high); adequate but not class-leading
Multimodal
Text + image input, text output only; no image generation natively
Pricing
Input
$2 / 1M tokens
Output
$6 / 1M tokens
Context
500K tokens
Benchmarks
Verdict history
Sources
- SpaceXAI — Introducing Grok 4.5 (official blog)Jul 2026
- SpaceXAI Docs — grok-4-5 model pageJul 2026
- TechCrunch — SpaceXAI releases Grok 4.5, which Elon describes as an 'Opus-class model'Jul 2026
- Axios — Scoop: Musk's SpaceXAI releases new model, Grok 4.5Jul 2026
- The Next Web — SpaceXAI launches Grok 4.5Jul 2026
- Digital Applied — Grok 4.5 spec sheet (context window, pricing, capabilities)Jul 2026
- LM Market Cap — Grok 4.5 pricing and benchmarksJul 2026
- Artificial Analysis — Grok 4.5 intelligence/performance metricsJul 2026
- Roo (beehiiv) — Grok 4.5 benchmark deep-diveJul 2026
Verification log
- Pricing— No changes
Automated agent
- Pricing— No changes
Automated agent
- Profile— No changes
Imported at launch
- Pricing— No changes
Imported at launch