Skip to main content
AIDiveForge AIDiveForge

Grok Code Fast 1 vs OpenFang

Bottom line

Grok Code Fast 1 has a free plan plus paid upgrades, while OpenFang is free. OpenFang is open source and Grok Code Fast 1 is not. You can run OpenFang on your own machine or server; Grok Code Fast 1 is hosted by the vendor.

Which one should you try?

Grok Code Fast 1

Freemium

Best for <cite index="1-4">Agentic coding workflows requiring fast loops of reasoning and tool calls</cite>

Visit Grok Code Fast 1 See full review

OpenFang

Free

Best for Teams needing 24/7 autonomous agents without manual prompting

Visit OpenFang See full review

Pricing, capabilities and platforms side by side. Prices are as of the "Pricing checked" date in the table.

Grok Code Fast 1

Grok Code Fast 1

<cite index="2-1">Released in late August 2025, the xAI Grok Code Fast 1 model is a coding-focused AI model that excels at common, high-volume coding task and is designed especially for agentic coding workflows.</cite> <cite index="1-6,1-7,1-8">Built from scratch with a brand-new model architecture, it was trained on a pre-training corpus rich with programming-related content, and curated high-quality datasets that reflect real-world pull requests and coding tasks.</cite> <cite index="1-23">The model is particularly adept at TypeScript, Python, Java, Rust, C++, and Go.</cite> <cite index="1-13">The model is generally available via the xAI API, priced at $0.20 / 1M input tokens, $1.50 / 1M output tokens, and $0.02 / 1M cached input tokens.</cite>

OpenFang

OpenFang

An open-source Agent Operating System built from scratch in Rust, designed to run autonomous agents on schedules.

AttributeGrok Code Fast 1OpenFang
PricingFreemiumFree
Price$30/monthFree (MIT / Apache-2.0, self-hosted)
Pricing checkedJun 11, 2026Oct 19, 2026
Free trial0 daysNot stated
Open sourceNoYes
Has APIYesYes
Self-hosted optionNoYes
Platforms<cite index="30-1">Available through xAI API and integrated with launch partners including GitHub Copilot, Cursor, Cline, Roo Code, Kilo Code, opencode, and Windsurf</cite>macOS, Linux, and Windows
Languages<cite index="1-23">TypeScript, Python, Java, Rust, C++, and Go</cite>Built with Rust
Released2025-08-282026-02
Pros
  • <cite index="2-25,2-26">Massive throughput of approximately 90-100 tokens per second, delivering dozens of tool calls and edits before you finish reading its initial plan in IDE integrations</cite>
  • <cite index="1-13">Economical pricing at $0.20/1M input tokens and $1.50/1M output tokens</cite>
  • <cite index="2-27,2-28,2-29">Visible reasoning traces that provide real-time, summarized view of its reasoning process, helping developers catch logic errors early</cite>
  • <cite index="1-22">Prompt caching optimizations regularly achieving cache hit rates above 90% when used with launch partners</cite>
  • Compiles to a single ~32MB binary with no external dependencies
  • Seven autonomous Hands and 16 security layers included
  • 40 messaging channel adapters provide the broadest platform coverage
  • 15-crate modular Rust workspace enables extensibility and maintenance
  • Comprehensive security including WASM dual-metered sandbox, Ed25519 signing, Merkle audit trail, and taint tracking
Cons
  • <cite index="6-31,6-34">Potential gaps in training on specific frameworks; poor performance on Tailwind CSS v3 tasks, suggesting possible smaller model size limitations</cite>
  • <cite index="6-36">Its reasoning model nature makes it unsuitable for interactive workflows requiring fast responses despite fast token throughput</cite>
  • Feature complete but pre-1.0 status means rough edges and breaking changes between minor versions
  • Not all Hands are equally mature; Browser and Researcher are most battle-tested
  • Target for rock-solid v1.0 is mid-2026, indicating ongoing volatility expected

Made up your mind?

Grok Code Fast 1

Freemium

Best for <cite index="1-4">Agentic coding workflows requiring fast loops of reasoning and tool calls</cite>

Visit Grok Code Fast 1 See full review

OpenFang

Free

Best for Teams needing 24/7 autonomous agents without manual prompting

Visit OpenFang See full review

Related comparisons

Free trials & curated lists

Specs come from each tool's own site and docs (how we test). AIDiveForge is editorially independent.

Browse tools · Affiliate Disclosure · Privacy · Cookies · · Email Policy · Terms · DMCA