Coding · Head-to-head
GPT-5.5 vs Grok Build
GPT-5.5 (paid, AI Score 9.4/10) vs Grok Build (paid, AI Score 7.8/10). Side-by-side pricing, features, pros and cons, and which to pick.
The verdict
Pick GPT-5.5 if…
- →you need a genuinely free option
- →overall capability matters more than price (AI Score 9.4 vs 7.8)
- →you want our editor's pick for this category
Side-by-side specs
| Spec | GPT-5.5 | Grok Build |
|---|---|---|
| Category | Coding | Coding |
| Pricing model | paid | paid |
| Headline pricing | API: $5/$30 per 1M tokens (in/out). ChatGPT Plus $20/mo, Pro $200/mo | Included with SuperGrok ($30/mo) or X Premium+ ($40/mo) |
| Free tier | No free API tier. Free ChatGPT users get GPT-4o, not GPT-5.5. | — |
| AI Score | 9.4/10 | 7.8/10 |
| Best for | — | — |
| Editor's pick | ✓ Yes | — |
| Use cases | — | — |
| Date added | 2026-05-02 | 2026-05-26 |
Pros and cons
GPT-5.5
Coding · paid
Pros
- ✓Top-of-class coding and reasoning benchmarks — measurably ahead of GPT-5 and competitive alternatives
- ✓True agentic capability with tool use, self-correction, and multi-step task completion
- ✓272K context handles entire codebases without chunking workarounds
- ✓Codex integration turns it into an autonomous software engineer inside ChatGPT
Cons
- ×API pricing is premium — $30/M output tokens adds up fast for heavy usage
- ×No free tier for the API; ChatGPT Free users are stuck on GPT-4o
- ×Slower inference than lighter models like GPT-4o-mini for simple tasks
- ×Closed-source with no self-hosting option — full vendor lock-in to OpenAI
🔧
Grok Build
Coding · paid
Pros
- ✓Plan Mode and subagents give strong control over complex multi-step coding tasks
- ✓Unique Imagine integration lets you generate images without leaving the terminal
- ✓Hooks and Skills system enables custom automation and reusable workflow templates
- ✓Competitive API pricing at ~$1/M input tokens if building custom tooling on the model
Cons
- ×Beta-only — expect bugs, missing features, and breaking changes as it matures
- ×No free tier; requires a $30-40/mo subscription just to access the CLI
- ×Brand new with no ecosystem of extensions, plugins, or community tooling yet
- ×Entering a crowded field where Claude Code and Aider have significant head starts
FAQ
Is GPT-5.5 better than Grok Build? ▾
GPT-5.5 scores 9.4/10 in our evaluation versus Grok Build at 7.8/10. GPT-5.5 edges ahead overall, but "better" depends on your use case — see the verdict block above.
Does GPT-5.5 or Grok Build have a free tier? ▾
GPT-5.5 has a free tier (No free API tier. Free ChatGPT users get GPT-4o, not GPT-5.5.). Grok Build is paid.
Should I choose GPT-5.5 or Grok Build in 2026? ▾
If you need a genuinely free option pick GPT-5.5. If grok Build's overall approach fits you better pick Grok Build. Both are credible — neither is a wrong choice.
Related comparisons
Updated 2026-06-27. Spec data sourced from official product pages and tracked in our public directory at /tools.