Coding · Head-to-head
GPT-5.5 vs Grok Build
GPT-5.5 vs Grok Build: pricing, features, and which to pick in 2026.
The verdict
Pick GPT-5.5 if…
- →overall capability matters more than price (AI Score 9.4 vs 8.2)
- →you want our editor's pick for this category
- →your primary use case is developers and teams needing a frontier reasoning model for agentic coding workflows and large-codebase context handling.
Pick Grok Build if…
- →budget is the constraint
- →your primary use case is developers who want a terminal agent on grok 4.6 with a plan you approve before edits.
- →you need: productivity
Side-by-side specs
| Spec | GPT-5.5 | Grok Build |
|---|---|---|
| Category | Coding | Coding |
| Pricing model | paid | freemium |
| Headline pricing | API: $5/$30 per 1M tokens (in/out). ChatGPT Plus $20/mo, Pro $200/mo | Product page says you can try it free; SuperGrok and X Premium+ still listed as paid paths |
| Free tier | No free API tier. Free ChatGPT users get GPT-4o, not GPT-5.5. | The August 2026 product page advertises a free try. Limits are not spelled out on that page. |
| AI Score | 9.4/10 | 8.2/10 |
| Best for | Developers and teams needing a frontier reasoning model for agentic coding workflows and large-codebase context handling. | Developers who want a terminal agent on Grok 4.6 with a plan you approve before edits. |
| Editor's pick | ✓ Yes | — |
| Use cases | development agents | development agents productivity |
| 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 · freemium
Pros
- ✓Defaults to Grok 4.6 as of August 12, 2026
- ✓Plan review before edits is built in, not a plugin
- ✓Skills, hooks, and MCP are documented on the product page
- ✓Install is a single documented curl command
Cons
- ×Free-try limits are not published on the product page
- ×Terminal-only; no first-party IDE listed next to the CLI
- ×Not the same product as Grok Bot, which has its own paid gate
- ×First-week 2x usage offer ends August 19, 2026
Related comparisons
Updated 2026-08-17. Spec data sourced from official product pages and tracked in our public directory at /tools.