Pairwise benchmark snapshot · Aug 16, 2026

Claude Opus 4.5 vs Grok 4.6 benchmark

Name: Claude Opus 4.5 vs Grok 4.6 AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares Claude Opus 4.5 (Anthropic) and Grok 4.6 (xAI) using the latest snapshots we have as of Aug 16, 2026. On preference Elo, Grok 4.6 is ahead by 24 points (1,592 vs 1,568; seed-bootstrap (Aug 16, 2026)). On SWE-bench coding, Claude Opus 4.5 resolves 76.8% versus 69.1% (seed-bootstrap (Aug 1, 2026)). Grok 4.6 streams faster (118 tok/s) while Grok 4.6 is the cheaper output token ($6/1M). Grok 4.6 has the larger context window (500k tokens). Every cell below is a dated snapshot from a named public source — we do not invent missing scores, and we do not run SWE-bench ourselves.

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Anthropic

Claude Opus 4.5

Anthropic frontier coding and computer-use model. SWE-bench leader on the official mini-SWE-agent harness in the Feb 2026 refresh.

Elo 1,568$25/1M out

xAI

Grok 4.6

xAI Aug 12 2026 post-training refresh of Grok 4.5. Same $2/$6 API price, 500k context, stronger agentic traces.

Elo 1,592$6/1M out

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Model A

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Quick vs:vs Claude Opus 4.6 vs Claude Sonnet 4.5 vs Claude 3.7 Sonnet vs GPT-5

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Claude Opus 4.5 (2)vsGrok 4.6 (8)

Claude Opus 4.5: 2W (20%)Overall: Grok 4.6Grok 4.6: 8W (80%)

← Claude Opus 4.5Grok 4.6 →

Grok 4.6 (3/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

1,568vs1,592

Coding Elo

1,574vs1,568

SWE-bench

76.8%vs69.1%

LiveBench

71.2%vs71.4%

GPQA Diamond

84.1%vs84.6%

Claude Opus 4.5: 2WGrok 4.6: 3W

Grok 4.6 (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

62 tok/svs118 tok/s

Time to first token

380 msvs195 ms

Claude Opus 4.5: 0WGrok 4.6: 2W

Grok 4.6 (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$25/1Mvs$6/1M

Input price

$5/1Mvs$2/1M

Context window

200kvs500k

Claude Opus 4.5: 0WGrok 4.6: 3W

Capability Matchup Radar

Multi-Dimensional Capability Radar

Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.

Tap any node to inspect

Percentile 0–100

Dimensional AdvantageGrok 4.6 5/6

Preference Elo

Grok 4.6

24 pts advantage

Throughput Speed

Grok 4.6

56 tok/s faster

Price Efficiency

Grok 4.6

$19.00/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

1,568

EloHigh is better

1,592+2%

Code Elo

High is better

1,574

Code EloHigh is better

1,568

LiveBench

High is better

71.2%

LiveBenchHigh is better

71.4%

SWE-bench

High is better

+11%76.8%

SWE-benchHigh is better

69.1%

GPQA

High is better

84.1%

GPQAHigh is better

84.6%+1%

TTFT

Low is better

380 ms

TTFTLow is better

195 ms+95%

Speed

High is better

62 tok/s

SpeedHigh is better

118 tok/s+90%

In $

Low is better

$5/1M

In $Low is better

$2/1M+150%

Out $

Low is better

$25/1M

Out $Low is better

$6/1M+317%

Context

High is better

200k

ContextHigh is better

500k+150%

Interactive Simulator

Workload Cost & Savings Calculator

Simulate monthly production API costs based on published $/1M tokens.

Save up to 71% with Grok 4.6

Monthly Volume50M tokens/mo

Quick Presets:

Token Ratio (In vs Out)70% In / 30% Out

RAG / Search (10% out)Coding / Chat (50% out)

Claude Opus 4.5$550.00 / mo

In: $175.00Out: $375.00

Grok 4.6$160.00 / mo

In: $70.00Out: $90.00

Estimated Cost Delta

Grok 4.6 is estimated to save $390.00/month ($4,680/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
Claude Opus 4.5:Pick Claude Opus 4.5 when repo-level coding accuracy is the constraint.
2
Grok 4.6:Pick Grok 4.6 when you are optimizing output cost.
3
Grok 4.6:Pick Grok 4.6 when time-to-first-token matters more than peak Elo.

Recommended Workload Routing

Repo / coding agentsClaude Opus 4.5

Higher SWE-bench (76.8%).

High-volume chatGrok 4.6

Lower output list price ($6/1M).

Voice / low-latency UIGrok 4.6

Lower TTFT (195 ms).

Long-document RAGGrok 4.6

Larger window (500k).

Screenshots / visionGrok 4.6

Both accept images. Defaulting to the higher-Elo side (Grok 4.6).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Claude Opus 4.5	Higher SWE-bench (76.8%).
High-volume chat	Grok 4.6	Lower output list price ($6/1M).
Voice / low-latency UI	Grok 4.6	Lower TTFT (195 ms).
Long-document RAG	Grok 4.6	Larger window (500k).
Screenshots / vision	Grok 4.6	Both accept images. Defaulting to the higher-Elo side (Grok 4.6).

Related Editorial Dispatches & Benchmark Notes

View all news

compareAug 12, 2026

Grok vs ChatGPT: price and Elo, not a personality contest

Brand hub remaps to top xAI vs top OpenAI. After Aug 12 that is Grok 4.6 vs Sol.

launchAug 12, 2026

Grok 4.6 (Aug 12): post-training refresh, same $2/$6 list

xAI’s Aug 12 2026 refresh of Grok 4.5. 500k context. The Grok vs ChatGPT hub remaps here.

launchFeb 20, 2026

Claude Opus 4.5 and the Feb 2026 SWE-bench row we still cite

The Feb refresh made 4.5 a coding reference. Newer Opus SKUs exist; this row stays as the dated harness point.

launchJul 10, 2025

Grok 4 remains the previous xAI flagship on this catalog

2025-07 row. 4.6 is the buy. We keep 4 so upgrade pairs and old inbound links resolve.

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LIVE

Anthropic

Claude Opus 4.5

Elo 1,568

LiveBench71.2%

SWE-bench76.8%

Speed62 tok/s

Output cost$25/1M

xAI

Grok 4.6

Elo 1,592

LiveBench71.4%

SWE-bench69.1%

Speed118 tok/s

Output cost$6/1M

Frequently Asked Questions

Which is better overall, Claude Opus 4.5 or Grok 4.6?: Grok 4.6 has the higher preference Elo in our latest snapshot (1,592). “Better” still depends on coding, price, and latency — see the table.
Which is better at coding, Claude Opus 4.5 or Grok 4.6?: Claude Opus 4.5 leads SWE-bench at 76.8% vs 69.1%. SWE-bench is one harness, not your repo.
Which is cheaper to run in production?: Grok 4.6 output tokens are $6/1M versus $25/1M. Input prices and retry rates still move the real bill.
Which is faster, Claude Opus 4.5 or Grok 4.6?: Grok 4.6 has the lower time-to-first-token (195 ms vs 380 ms). Tokens/sec is a separate column if you care about long completions.
Which has the larger context window?: Grok 4.6 accepts 500k tokens versus 200k.
Can I self-host either model?: Neither model is marked open-weights here. You are comparing hosted APIs.
Are these scores from CompareLLM’s own evals?: No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?: Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Claude Opus 4.5 and Grok 4.6 Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All Claude Opus 4.5 matchups →|All Grok 4.6 matchups →

Claude Opus 4.5 vs Claude Opus 4 (previous opus)Claude Opus 4.5 vs Claude Opus 4.6 (next opus)Grok 4.6 vs Grok 4 (previous grok)Claude Sonnet 5 vs Claude Opus 4.5 Claude Opus 4.8 vs Grok 4.6 Claude Sonnet 4.5 vs Claude Opus 4.5

Claude Opus 4.5 vs Grok 4.6 benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Claude Opus 4.5 (2)vsGrok 4.6 (8)

Claude Opus 4.5: 2W (20%)Overall: Grok 4.6Grok 4.6: 8W (80%)

← Claude Opus 4.5Grok 4.6 →

Grok 4.6 (3/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

1,568vs1,592

Coding Elo

1,574vs1,568

SWE-bench

76.8%vs69.1%

LiveBench

71.2%vs71.4%

GPQA Diamond

84.1%vs84.6%

Claude Opus 4.5: 2WGrok 4.6: 3W

Grok 4.6 (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

62 tok/svs118 tok/s

Time to first token

380 msvs195 ms

Claude Opus 4.5: 0WGrok 4.6: 2W

Grok 4.6 (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$25/1Mvs$6/1M

Input price

$5/1Mvs$2/1M

Context window

200kvs500k

Claude Opus 4.5: 0WGrok 4.6: 3W

Recommended Workload Routing

Repo / coding agentsClaude Opus 4.5

Higher SWE-bench (76.8%).

High-volume chatGrok 4.6

Lower output list price ($6/1M).

Voice / low-latency UIGrok 4.6

Lower TTFT (195 ms).

Long-document RAGGrok 4.6

Larger window (500k).

Screenshots / visionGrok 4.6

Both accept images. Defaulting to the higher-Elo side (Grok 4.6).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Claude Opus 4.5	Higher SWE-bench (76.8%).
High-volume chat	Grok 4.6	Lower output list price ($6/1M).
Voice / low-latency UI	Grok 4.6	Lower TTFT (195 ms).
Long-document RAG	Grok 4.6	Larger window (500k).
Screenshots / vision	Grok 4.6	Both accept images. Defaulting to the higher-Elo side (Grok 4.6).

Frequently Asked Questions

Which is better overall, Claude Opus 4.5 or Grok 4.6?

Grok 4.6 has the higher preference Elo in our latest snapshot (1,592). “Better” still depends on coding, price, and latency — see the table.

Which is better at coding, Claude Opus 4.5 or Grok 4.6?

Claude Opus 4.5 leads SWE-bench at 76.8% vs 69.1%. SWE-bench is one harness, not your repo.

Which is cheaper to run in production?

Grok 4.6 output tokens are $6/1M versus $25/1M. Input prices and retry rates still move the real bill.

Which is faster, Claude Opus 4.5 or Grok 4.6?

Grok 4.6 has the lower time-to-first-token (195 ms vs 380 ms). Tokens/sec is a separate column if you care about long completions.

Which has the larger context window?

Grok 4.6 accepts 500k tokens versus 200k.

Can I self-host either model?

Neither model is marked open-weights here. You are comparing hosted APIs.

Are these scores from CompareLLM’s own evals?

No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.

What does preference Elo mean on this page?

Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Claude Opus 4.5 and Grok 4.6 Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

Grok 4.6

Grok 4.6

Grok 4.6

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Grok vs ChatGPT: price and Elo, not a personality contest

Grok 4.6 (Aug 12): post-training refresh, same $2/$6 list

Claude Opus 4.5 and the Feb 2026 SWE-bench row we still cite

Grok 4 remains the previous xAI flagship on this catalog

Cast Your Matchup Vote

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CompareLLM Matrix

Claude Opus 4.5

Grok 4.6

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

Grok 4.6

Grok 4.6

Grok 4.6

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Grok vs ChatGPT: price and Elo, not a personality contest

Grok 4.6 (Aug 12): post-training refresh, same $2/$6 list

Claude Opus 4.5 and the Feb 2026 SWE-bench row we still cite

Grok 4 remains the previous xAI flagship on this catalog

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

Claude Opus 4.5

Grok 4.6

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons