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Every score has a dated snapshot.

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  3. Claude 3 Opus vs Grok 3

Pairwise benchmark snapshot · Aug 1, 2026

Claude 3 Opus vs Grok 3 benchmark

In this head-to-head showdown, Grok 3 delivers higher overall intelligence and human-preferred responses (Elo 1,405 vs 1,248), while Grok 3 leads in SWE-bench software engineering benchmarks (51.4%), while Grok 3 is more budget-friendly at $15/1M per 1M output tokens. Review the complete breakdown below to determine which model best fits your performance and budget requirements.

Executive Comparison Verdict

Bottom Line: Grok 3 holds the advantage over Claude 3 Opus in overall benchmark performance and human evaluation rankings. Choose Grok 3 for demanding workloads, or review the breakdown below to compare coding and pricing metrics.
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Verified Head-to-Head Advantage Breakdown

9 direct benchmark disciplines evaluated across capability, speed, and cost

Claude 3 Opus (1)Grok 3 (8)
Claude 3 Opus
1 of 9 Wins
✓Context window
Grok 3
8 of 9 Wins
✓Preference Elo✓LiveBench✓SWE-bench✓GPQA Diamond✓Time to first token✓Output speed✓Input price✓Output price
Anthropic
Leads 1 of 9 metrics
Claude 3 Opus

Original Claude 3 flagship. Kept so opus 3 vs later Opus and vs GPT-4o still resolve.

Elo 1,248$75/1M out
xAI
Leads 8 of 9 metrics
Grok 3

Previous xAI generation before Grok 4. Kept for grok 3 vs grok 4.

Elo 1,405$15/1M out
Top Rival Showdowns for Claude 3 Opus
All Matchups
Compare vs:vs GPT-5vs Gemini 3 Provs Grok 4.6vs DeepSeek V4 Provs Qwen 3 Max
Preference LeaderGrok 3 Wins

Grok 3

Δ 157 Arena Elo pts

Throughput LeaderGrok 3 Wins

Grok 3

88 tok/s

Value per Dollar LeaderGrok 3 Wins

Grok 3

$15 / 1M output

Capability Percentiles

Relative percentile scores computed across all active models in the benchmark catalog.

Multi-Dimensional Capability Radar

Leaders Matchup Capability Radar

Comparing top Western standard models with China's leading frontier rival across 6 skill dimensions. Tap any spoke or dot to inspect.

Tap any node to inspect
Percentile 0–100
Head-to-Head Comparison

Overall Matchup Breakdown

Category wins across reasoning intelligence, generation speed, and token cost.

Claude 3 Opus (1)vsGrok 3 (8)
Claude 3 Opus: 1W (11%)Overall: Grok 3Grok 3: 8W (89%)
← Claude 3 OpusGrok 3 →
🏆Grok 3(4/5)

Intelligence & Reasoning

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

Benchmark
Claude 3 OpusvsGrok 3
Preference Elo
1,248vs1,405+157
Coding Elo
—vs—
SWE-bench
38.4%vs51.4%+13%
LiveBench
46.2%vs60.2%+14%
GPQA Diamond
50.4%vs74.2%+23.8%
Claude 3 Opus: 0WGrok 3: 4W
🏆Grok 3(2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Benchmark
Claude 3 OpusvsGrok 3
Output speed
48 tok/svs88 tok/s+40 tok/s
Time to first token
420 msvs250 ms+170 ms
Claude 3 Opus: 0WGrok 3: 2W
🏆Grok 3(2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Benchmark
Claude 3 OpusvsGrok 3
Output price
$75/1Mvs$15/1M+$60/1M
Input price
$15/1Mvs$3/1M+$12/1M
Context window
200kvs131k+69k
Claude 3 Opus: 1WGrok 3: 2W

Side-by-Side Benchmark Matrix

Preference Elo+157
Claude 3 Opus1,248
seed-bootstrap · Aug 1, 2026
Grok 31,405
seed-bootstrap · Aug 1, 2026
LiveBench+14%
Claude 3 Opus46.2%
seed-bootstrap · Aug 1, 2026
Grok 360.2%
seed-bootstrap · Aug 1, 2026
SWE-bench+13%
Claude 3 Opus38.4%
seed-bootstrap · Aug 1, 2026
Grok 351.4%
seed-bootstrap · Aug 1, 2026
GPQA Diamond+23.8%
Claude 3 Opus50.4%
seed-bootstrap · Aug 1, 2026
Grok 374.2%
seed-bootstrap · Aug 1, 2026
Time to first token+170 ms
Claude 3 Opus420 ms
seed-bootstrap · Aug 1, 2026
Grok 3250 ms
seed-bootstrap · Aug 1, 2026
Output speed+40 tok/s
Claude 3 Opus48 tok/s
seed-bootstrap · Aug 1, 2026
Grok 388 tok/s
seed-bootstrap · Aug 1, 2026
Input price+$12/1M
Claude 3 Opus$15/1M
seed-bootstrap · Aug 1, 2026
Grok 3$3/1M
seed-bootstrap · Aug 1, 2026
Output price+$60/1M
Claude 3 Opus$75/1M
seed-bootstrap · Aug 1, 2026
Grok 3$15/1M
seed-bootstrap · Aug 1, 2026
Context window+69k
Claude 3 Opus200k
seed-bootstrap · Aug 1, 2026
Grok 3131k
seed-bootstrap · Aug 1, 2026
BenchmarkClaude 3 OpusGrok 3Advantage Delta
Preference Elo
1,248
seed-bootstrap · Aug 1, 2026
1,405
seed-bootstrap · Aug 1, 2026
+157
LiveBench
46.2%
seed-bootstrap · Aug 1, 2026
60.2%
seed-bootstrap · Aug 1, 2026
+14%
SWE-bench
38.4%
seed-bootstrap · Aug 1, 2026
51.4%
seed-bootstrap · Aug 1, 2026
+13%
GPQA Diamond
50.4%
seed-bootstrap · Aug 1, 2026
74.2%
seed-bootstrap · Aug 1, 2026
+23.8%
Time to first token
420 ms
seed-bootstrap · Aug 1, 2026
250 ms
seed-bootstrap · Aug 1, 2026
+170 ms
Output speed
48 tok/s
seed-bootstrap · Aug 1, 2026
88 tok/s
seed-bootstrap · Aug 1, 2026
+40 tok/s
Input price
$15/1M
seed-bootstrap · Aug 1, 2026
$3/1M
seed-bootstrap · Aug 1, 2026
+$12/1M
Output price
$75/1M
seed-bootstrap · Aug 1, 2026
$15/1M
seed-bootstrap · Aug 1, 2026
+$60/1M
Context window
200k
seed-bootstrap · Aug 1, 2026
131k
seed-bootstrap · Aug 1, 2026
+69k
Interactive Simulator (USD)

Workload Cost & Savings Calculator

Simulate monthly production API costs in USD (US Dollar).

Save up to 80% with Grok 3
Monthly Volume50M tokens/mo
Quick Presets:
Token Ratio (In vs Out)70% In / 30% Out
RAG / Search (10% out)Coding / Chat (50% out)
Claude 3 Opus$1,650.00 / mo
In: $525Out: $1,125
Grok 3$330.00 / mo
In: $105Out: $225
Estimated Cost Delta

Grok 3 is estimated to save $1,320.00/month ($15,840/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

  • 1
    Grok 3:Pick Grok 3 when repo-level coding accuracy is the constraint.
  • 2
    Grok 3:Pick Grok 3 when time-to-first-token matters more than peak Elo.
  • 3
    Grok 3:Pick Grok 3 as the default general assistant.

Recommended Workload Routing

Repo / coding agentsGrok 3

Higher SWE-bench (51.4%).

High-volume chatGrok 3

Lower output list price ($15/1M).

Voice / low-latency UIGrok 3

Lower TTFT (250 ms).

Long-document RAGClaude 3 Opus

Larger window (200k).

Screenshots / visionGrok 3

Both accept images. Defaulting to the higher-Elo side (Grok 3).

Target WorkloadRecommended PickEvaluation Rationale
Repo / coding agentsGrok 3Higher SWE-bench (51.4%).
High-volume chatGrok 3Lower output list price ($15/1M).
Voice / low-latency UIGrok 3Lower TTFT (250 ms).
Long-document RAGClaude 3 OpusLarger window (200k).
Screenshots / visionGrok 3Both accept images. Defaulting to the higher-Elo side (Grok 3).
Community Sentiment

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CompareLLM AI Matrix

Verified Head-to-Head Telemetry

LIVE BENCHMARK
VS
Anthropic

Claude 3 Opus

Elo 1,248
SWE-bench38.4%
Speed (tok/s)48 tok/s
Input / 1M Tokens$15/1M
Output / 1M Tokens$75/1M
xAI

Grok 3

Elo 1,405
SWE-bench51.4%
Speed (tok/s)88 tok/s
Input / 1M Tokens$3/1M
Output / 1M Tokens$15/1M

Frequently Asked Questions

Which is better overall, Claude 3 Opus or Grok 3?
Grok 3 has the higher preference Elo in our latest snapshot (1,405). “Better” still depends on coding, price, and latency — see the table.
Which is better at coding, Claude 3 Opus or Grok 3?
Grok 3 leads SWE-bench at 51.4% vs 38.4%. SWE-bench is one harness, not your repo.
Which is cheaper to run in production?
Grok 3 output tokens are $15/1M versus $75/1M. Input prices and retry rates still move the real bill.
Which is faster, Claude 3 Opus or Grok 3?
Grok 3 has the lower time-to-first-token (250 ms vs 420 ms). Tokens/sec is a separate column if you care about long completions.
Which has the larger context window?
Claude 3 Opus accepts 200k tokens versus 131k.
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 3 Opus and Grok 3 Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All Claude 3 Opus matchups →|All Grok 3 matchups →
Claude 3 Opus vs Claude Opus 4 (next opus)Grok 3 vs Grok 4 (next grok)Claude Opus 4.5 vs Grok 3Claude Opus 4.6 vs Grok 3Claude Sonnet 4.5 vs Grok 3Grok 4.6 vs Grok 3