xAI · Grok 4.5 · 16 July 2026
A new flagship is a reason to test, not a universal recommendation.
xAI launched Grok 4.5 for coding, agentic tasks and knowledge work, with configurable reasoning and access through Grok Build and the API.
Watch, then test where coding or document production is already measurable. Do not migrate because one launch chart says ‘best.’
Why this may matter
A stronger option can improve a workflow or lower running cost. Provider benchmarks do not tell an owner whether the model understands their files, catches exceptions or reduces review time.
Inspect every benchmark’s task, harness and comparison conditions. Then measure the job you actually pay people to do.
Inspect the change, example and test detail
What changed
The provider positions Grok 4.5 as its new flagship and default model in Grok Build, emphasising engineering work, office documents, speed and token efficiency.
Real example
A technical team should run its own bug-fix or spreadsheet task against the current tool, holding inputs constant and scoring correctness, elapsed time, cost and correction effort.
Test status
No test is attached to this item. Its current evidence state should not be read as a Human Bit result.
Sources and review
Sources retain their own provenance. A provider announcement establishes what was announced; it does not become independent testing.
Canonical claim: The provider positions Grok 4.5 as its new flagship and default model in Grok Build, emphasising engineering work, office documents, speed and token efficiency.
Readiness: Keep this visible without changing guidance until stronger evidence arrives.
- Released
- 16 July 2026
- Reviewed
- 25 July 2026
- Review by
- 8 August 2026
- Review owner
- The Human Bit editorial
- Revision
- grok-45-launch@v1
- Volatility
- volatile