# Grok 4.7 vs Claude Opus 5.5

Grok 4.7 (xAI) and Claude Opus 5.5 (Anthropic) compared on the facts each vendor publishes. On cost, pick Grok 4.7: it lists $2 in and $6 out per 1M tokens, against $4 and $20 for Claude Opus 5.5. For very long inputs, Claude Opus 5.5 lists the larger context window: 1M tokens against 500K. We have not run either model: every value below is Reported, with a link to its source.

Updated: 2026-10-29 · Canonical: https://theagenticweekly.com/compare/grok-4-7-vs-claude-opus-5-5 · Evidence: Reported (not run by us)

## Specs

| | [Grok 4.7](https://theagenticweekly.com/models/grok-4-7) | [Claude Opus 5.5](https://theagenticweekly.com/models/claude-opus-5-5) |
|---|---|---|
| Price (as listed) | $2 in / $6 out per 1M tokens ([source](https://docs.x.ai/developers/models/grok-4.7)) | $4 in / $20 out per 1M tokens ([source](https://platform.claude.com/docs/en/about-claude/models/overview)) |
| Context window | 500,000 tokens (500K) ([source](https://docs.x.ai/developers/models/grok-4.7)) | 1,000,000 tokens (1M) ([source](https://platform.claude.com/docs/en/about-claude/models/overview)) |
| Max output | Not published | 128,000 tokens ([source](https://platform.claude.com/docs/en/about-claude/models/overview)) |
| Input | text, image ([source](https://docs.x.ai/developers/models/grok-4.7)) | text, image ([source](https://platform.claude.com/docs/en/about-claude/models/overview)) |
| Output | text ([source](https://docs.x.ai/developers/models/grok-4.7)) | text ([source](https://platform.claude.com/docs/en/about-claude/models/overview)) |
| Licence | Proprietary (API) ([source](https://docs.x.ai/developers/models/grok-4.7)) | Proprietary (API) ([source](https://platform.claude.com/docs/en/about-claude/models/overview)) |
| Released | Sep 21, 2026 ([source](https://docs.x.ai/developers/release-notes)) | Sep 22, 2026 ([source](https://www.anthropic.com/news)) |
| Status | generally available | generally available |
| API id | grok-4.7 ([source](https://docs.x.ai/developers/models/grok-4.7)) | claude-opus-5-5 ([source](https://platform.claude.com/docs/en/about-claude/models/overview)) |

## How to choose

- On cost, pick Grok 4.7: it lists $2 in and $6 out per 1M tokens, against $4 and $20 for Claude Opus 5.5.
- For very long inputs, Claude Opus 5.5 lists the larger context window: 1M tokens against 500K.
- Claude Opus 5.5 is newer, by 1 day.

## Benchmark snapshots (not our tests)

- LMArena WebDev leaderboard (Elo-style score) (independent, 2026-10-22, [source](https://arena.ai/leaderboard/webdev)): Claude Opus 5.5 (Max) 1807
- Terminal-Bench 4.0 official leaderboard (independent, 2026-10-26, [source](https://www.tbench.ai/leaderboard/terminal-bench/4.0)): Claude Opus 5.5 (Claude Code, max) 64.8%; Grok 4.7 (Grok Build, xhigh) 37.6%
- SWE-bench Pro (Public), as reported by the vendors (vendor-reported, 2026-10-26, [source](https://benchmarkregistry.org/benchmarks/swe-bench-pro/public)): Claude Opus 5.5 (max) 89.9%
- Moonshot AI: Kimi K3.1 Pro launch post (Terminal-Bench 4.0) (vendor-reported, 2026-10-23, [source](https://www.kimi.ai/blog/kimi-k3-1-pro)): Claude Opus 5.5 66.4%

## FAQ

**Which is cheaper, Grok 4.7 or Claude Opus 5.5?** Grok 4.7: $2 in / $6 out per 1M tokens. Claude Opus 5.5: $4 in / $20 out per 1M tokens. Both prices are the vendors' own listed prices on the date each model was last verified.

**Which has the bigger context window?** Claude Opus 5.5, with 1,000,000 tokens against 500,000.

**Which is better for coding?** We have not tested either. Sourced snapshots: LMArena WebDev leaderboard (Elo-style score) (independent, Oct 22, 2026): Claude Opus 5.5 (Max) 1807; Terminal-Bench 4.0 official leaderboard (independent, Oct 26, 2026): Claude Opus 5.5 (Claude Code, max) 64.8%, Grok 4.7 (Grok Build, xhigh) 37.6%; SWE-bench Pro (Public), as reported by the vendors (vendor-reported, Oct 26, 2026): Claude Opus 5.5 (max) 89.9%; Moonshot AI: Kimi K3.1 Pro launch post (Terminal-Bench 4.0) (vendor-reported, Oct 23, 2026): Claude Opus 5.5 66.4%. Scores from different boards are not comparable with each other.

**Are Grok 4.7 and Claude Opus 5.5 open source?** Grok 4.7: Proprietary (API), no downloadable weights. Claude Opus 5.5: Proprietary (API), no downloadable weights.

**Did you test Grok 4.7 and Claude Opus 5.5?** No. This page is Reported: every fact is read from the vendor page linked beside it, and benchmark numbers come from the named boards.

## How to cite

Agentic Weekly, "Grok 4.7 vs Claude Opus 5.5", updated 2026-10-29, https://theagenticweekly.com/compare/grok-4-7-vs-claude-opus-5-5