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Grok vs Claude

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.

Reported Updated · Markdown · All model comparisons

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Grok 4.7

xAI · generally available · API only · released Sep 21, 2026

$ in / 1M tokens
$2
$ out / 1M tokens
$6
Context
500K
Max output
—

Claude Opus 5.5

Anthropic · generally available · API only · released Sep 22, 2026

$ in / 1M tokens
$4
$ out / 1M tokens
$20
Context
1M
Max output
128K

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.

Specs side by side

Each value is read from the vendor page linked beside it. “Not published” means we found no vendor figure, not that the feature is missing.

Grok 4.7 vs Claude Opus 5.5: specs with sources
SpecGrok 4.7Claude Opus 5.5
Price (as listed)$2 in / $6 out per 1M tokenssource$4 in / $20 out per 1M tokenssource
Context window500,000 tokens (500K)source1,000,000 tokens (1M)source
Max outputNot published128,000 tokenssource
Inputtext, imagesourcetext, imagesource
Outputtextsourcetextsource
LicenceProprietary (API)sourceProprietary (API)source
ReleasedSep 21, 2026sourceSep 22, 2026source
Statusgenerally availablegenerally available
API idgrok-4.7sourceclaude-opus-5-5source

Benchmark snapshots

From the boards named below, not our tests. Boards use different tasks and settings, so compare within a row, never across rows.

Benchmark snapshots for Grok 4.7 vs Claude Opus 5.5
BoardGrok 4.7Claude Opus 5.5Type, date
LMArena WebDev leaderboard (Elo-style score)not listed1807Independent, Oct 22, 2026
Terminal-Bench 4.0 official leaderboard37.6%64.8%Independent, Oct 26, 2026
SWE-bench Pro (Public), as reported by the vendorsnot listed89.9%Vendor-reported, Oct 26, 2026
Moonshot AI: Kimi K3.1 Pro launch post (Terminal-Bench 4.0)not listed66.4%Vendor-reported, Oct 23, 2026

More context: best LLM for coding.

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.

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