Agentic Chat (Claude Opus 5) vs Grok Code Fast 1
Both have similar output pricing, while Agentic Chat (Claude Opus 5) offers a larger context window. Choose Agentic Chat (Claude Opus 5) or Grok Code Fast 1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Agentic Chat (Claude Opus 5) | Grok Code Fast 1 |
|---|---|---|
| Provider | GitLab Duo | OpenCode |
| Input / 1M tokens | $0.00 | $0.00 |
| Output / 1M tokens | $0.00 | $0.00 |
| Context window | 1M | 256K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Jul 2026 | Aug 2025 |
| LMArena WebDev Elo score | — | 1166 |
FAQ
Is Agentic Chat (Claude Opus 5) or Grok Code Fast 1 cheaper?
Agentic Chat (Claude Opus 5) and Grok Code Fast 1 have comparable output pricing.
Which has the larger context window, Agentic Chat (Claude Opus 5) or Grok Code Fast 1?
Agentic Chat (Claude Opus 5) has the larger context window (1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.