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Grok 4.6 vs Claude Opus 5

Claude Opus 5 scores higher than Grok 4.6 on all 3 public leaderboards that rate both. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, Grok 4.6 is at 52.6 and Claude Opus 5 at 77.5 (out of 100). On each maker's API, Grok 4.6 costs $2 / $6 per 1M tokens (input / output) and Claude Opus 5 $5 / $25.

Scores as published by each board; table composed November 10, 2026.

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Leaderboard by leaderboard

BoardGrok 4.6Claude Opus 5Higher
LMArena
Elo (community votes)
1,617.81,690.8Claude Opus 5
SimpleBench
AVG@5 % (private set)
75.980.6Claude Opus 5
Epoch AI
Epoch Capabilities Index (ECI) · many benchmarks on one scale
157.9164.5Claude Opus 5

Raw scores are each board's own scale, so compare within a row, not across rows. Full table: the bench index.

For coding

On the ArtificialWatch coding index, Grok 4.6 is at 34.7 (#32 of 47) and Claude Opus 5 at 85 (#7). Claude Opus 5 scores higher on both coding boards that rate them.

Coding boardGrok 4.6Claude Opus 5
LMArena · Coding1,463.81,531.9
Vals Vibe Code Bench76.288.4

The full AI coding leaderboard →

Grok 4.6 at a glance

Developer
xAI
Status
Live since August 12, 2026
API price
$2 input / $6 output per 1M tokens · xAI, grok-4.6
Context window
500K tokens

Live — Aug 12 at $2/$6 per 1M, unchanged from Grok 4.5.

Full Grok 4.6 tracker →

Claude Opus 5 at a glance

Developer
Anthropic
Status
Live since July 24, 2026
API price
$5 input / $25 output per 1M tokens · Anthropic, claude-opus-5
Context window
1M tokens

Live — detected 16:51 UTC Jul 24, alert fired 61s later · superseded by Opus 5.5 on Sep 22 and moved to Anthropic's legacy list; still served at $5/$25, which is now MORE than its successor.

Claude Opus 5 is live — we detected it at 16:51 UTC and had alerts out 61 seconds later

2026-07-24 · Anthropic's Claude Opus 5 went live on the public API today. Our checkers saw the id appear at 16:51:33 UTC, confirmed it on the next 60-second sweep, and the alert blast went out at 16:52:34 — sixty-one seconds from first sighting to inbox.

Full Claude Opus 5 tracker →

Grok 4.6 vs Claude Opus 5: quick answers

Which is better, Grok 4.6 or Claude Opus 5?

It depends on what you measure. Claude Opus 5 scores higher than Grok 4.6 on all 3 public leaderboards that rate both. Claude Opus 5's widest lead is on Epoch AI. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, Grok 4.6 is at 52.6 and Claude Opus 5 at 77.5 (out of 100).

Which is newer, Grok 4.6 or Claude Opus 5?

Grok 4.6. It went live on August 12, 2026, 19 days after Claude Opus 5 (July 24, 2026).

Which is cheaper, Grok 4.6 or Claude Opus 5?

Grok 4.6 is cheaper on both input and output. On each vendor's own API, Grok 4.6 is $2 input / $6 output per million tokens and Claude Opus 5 is $5 input / $25 output per million tokens. Grok 4.6's rate rises for prompts over 200K tokens. Prices as published in the models.dev catalog, as of 2026-11-10.

Which has the bigger context window, Grok 4.6 or Claude Opus 5?

Claude Opus 5, at 1M tokens against Grok 4.6's 500K, as each vendor lists it.

How do Grok 4.6 and Claude Opus 5 compare for coding?

On the ArtificialWatch coding index, Grok 4.6 is at 34.7 (#32 of 47) and Claude Opus 5 at 85 (#7). Claude Opus 5 scores higher on both coding boards that rate them.

Who makes Grok 4.6 and Claude Opus 5?

Grok 4.6 is from xAI; Claude Opus 5 is from Anthropic.

Where do these numbers come from?

Each score is the leaderboard's own published figure, read by ArtificialWatch (table composed November 10, 2026). Boards measure different things, so raw scores are only comparable within a row.

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