Comparison · under IB-CODE-2026.2
Grok Build vs OpenCode
| Grok Build | OpenCode | |
|---|---|---|
| Vendor | xAI | opencode.ai (OSS community) |
| Pricing | SuperHeavy intro $99/mo for first 6 months (then $299/mo); API at $0.20 / $1.50 per Mtok in/out | Free OSS + API tokens (BYOK); works with Ollama for local/zero-cost runs |
| Default model | Grok 3.5 (Grok Build proprietary fine-tune); 256K context; 70.8% SWE-bench Verified | Configurable — community default claude-sonnet-4-6 or gemini-2.5-pro |
| CLI surface | ✓ | ✓ |
| Eval status | deferred | in progress |
Comparison pending — neither side evaluated yet
Both Grok Build and OpenCode are currently unevaluated under IB-CODE-2026.2. This page will update as evaluations land.
Want this comparison sooner? Vendors can commission an evaluation to bump their tool up the queue (with full editorial independence on the verdict). Readers can email hello@indiebench.dev to vote for which comparison ships next.
About each tool
Grok Build
Grok Build launched May 14 2026 in early beta — xAI's entry in the agentic coding CLI category. The novel feature is multi-agent arena mode: up to 8 concurrent sub-agents working on parallel branches with a coordinator selecting the best result. Pricing is the steepest in this list for individual us…
OpenCode
OpenCode is the 2026 open-source breakout in agentic coding CLIs. Launched March 2025, crossed Cline and OpenHands in GitHub stars by April 2026 (140K+), closing the gap on Aider. Go-based TUI with built-in plan mode, MCP support, and provider-agnostic backends (75+ providers including local Ollama)…