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© 2026 CompareLLM. Public benchmark data aggregated from Arena Elo, LiveBench, SWE-bench & OpenRouter.

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  3. Claude 3 Opus vs Mistral Large 3

Pairwise benchmark snapshot · Aug 17, 2026

Claude 3 Opus vs Mistral Large 3 benchmark

In this head-to-head showdown, Mistral Large 3 delivers higher overall intelligence and human-preferred responses (Elo 1,456 vs 1,248), while Mistral Large 3 leads in SWE-bench software engineering benchmarks (55.4%), while Mistral Large 3 is more budget-friendly at $6/1M 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: Mistral Large 3 holds the advantage over Claude 3 Opus in overall benchmark performance and human evaluation rankings. Choose Mistral Large 3 for demanding workloads, or review the breakdown below to compare coding and pricing metrics.
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Executive Verdict Summary

Mistral Large 3 holds empirical advantage (8 of 9 metrics)

Coding / SWESWE-bench
Mistral Large 3Top code solve rate
ReasoningGPQA / Live
Mistral Large 3Top logical accuracy
Best Value$/1M Tok
Mistral Large 3Lowest API billing cost
Speed / TokTok/Sec
Mistral Large 3Fastest stream rate

Verified Advantage Breakdown

9 benchmarks evaluated across capability, speed, and cost

Claude 3 Opus (1)Mistral Large 3 (8)
Claude 3 Opus
1 of 9 Wins
✓Context window
Mistral Large 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
Claude 3 Opus

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

Elo 1,248In: $15 · Out: $75/1M
Mistral
Leads 8 of 9
Mistral Large 3

Mistral European flagship with strong function calling.

Elo 1,456In: $2 · Out: $6/1M
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 LeaderMistral Large 3 Wins

Mistral Large 3

Δ 208 Arena Elo pts

Throughput LeaderMistral Large 3 Wins

Mistral Large 3

112 tok/s

Value per Dollar LeaderMistral Large 3 Wins

Mistral Large 3

$6 / 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 standard models across 6 key capability dimensions. Tap any spoke or dot to inspect.

Tap any node to inspect
0–100 %ile

Overall Matchup Breakdown

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

Claude 3 Opus (1)vsMistral Large 3 (8)
Claude 3 Opus: 1W (11%)Overall: Mistral Large 3Mistral Large 3: 8W (89%)
← Claude 3 OpusMistral Large 3 →
🏆Mistral Large 3 Leads(4/5)

Intelligence & Reasoning

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

Benchmark
Claude 3 OpusvsMistral Large 3
Preference Elo
1,248vs1,456+208
Coding Elo
—vs—
SWE-bench
38.4%vs55.4%+17%
LiveBench
46.2%vs61.8%+15.6%
GPQA Diamond
50.4%vs74.1%+23.7%
Claude 3 Opus: 0WMistral Large 3: 4W
🏆Mistral Large 3 Leads(2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Benchmark
Claude 3 OpusvsMistral Large 3
Output speed
48 tok/svs112 tok/s+64 tok/s
Time to first token
420 msvs190 ms+230 ms
Claude 3 Opus: 0WMistral Large 3: 2W
🏆Mistral Large 3 Leads(2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Benchmark
Claude 3 OpusvsMistral Large 3
Output price
$75/1Mvs$6/1M+$69/1M
Input price
$15/1Mvs$2/1M+$13/1M
Context window
200kvs128k+72k
Claude 3 Opus: 1WMistral Large 3: 2W

Side-by-Side Benchmark Matrix

Claude 3 OpusMistral Large 3
Preference EloMistral Large 3 +208
Claude 3 Opus1,248
Mistral Large 31,456
LiveBenchMistral Large 3 +15.6%
Claude 3 Opus46.2%
Mistral Large 361.8%
SWE-benchMistral Large 3 +17%
Claude 3 Opus38.4%
Mistral Large 355.4%
GPQA DiamondMistral Large 3 +23.7%
Claude 3 Opus50.4%
Mistral Large 374.1%
Time to first tokenMistral Large 3 +230 ms
Claude 3 Opus420 ms
Mistral Large 3190 ms
Output speedMistral Large 3 +64 tok/s
Claude 3 Opus48 tok/s
Mistral Large 3112 tok/s
Input priceMistral Large 3 +$13/1M
Claude 3 Opus$15/1M
Mistral Large 3$2/1M
Output priceMistral Large 3 +$69/1M
Claude 3 Opus$75/1M
Mistral Large 3$6/1M
Context windowClaude 3 Opus +72k
Claude 3 Opus200k
Mistral Large 3128k
BenchmarkClaude 3 OpusMistral Large 3Advantage Delta
Preference Elo
1,248
lmarena · Aug 17, 2026
1,456
lmarena · Aug 17, 2026
+208
LiveBench
46.2%
livebench · Aug 17, 2026
61.8%
livebench · Aug 17, 2026
+15.6%
SWE-bench
38.4%
swebench · Aug 17, 2026
55.4%
swebench · Aug 17, 2026
+17%
GPQA Diamond
50.4%
seed-bootstrap · Aug 1, 2026
74.1%
seed-bootstrap · Aug 1, 2026
+23.7%
Time to first token
420 ms
seed-bootstrap · Aug 1, 2026
190 ms
seed-bootstrap · Aug 1, 2026
+230 ms
Output speed
48 tok/s
seed-bootstrap · Aug 1, 2026
112 tok/s
seed-bootstrap · Aug 1, 2026
+64 tok/s
Input price
$15/1M
seed-bootstrap · Aug 1, 2026
$2/1M
openrouter · Aug 17, 2026
+$13/1M
Output price
$75/1M
seed-bootstrap · Aug 1, 2026
$6/1M
openrouter · Aug 17, 2026
+$69/1M
Context window
200k
seed-bootstrap · Aug 1, 2026
128k
openrouter · Aug 17, 2026
+72k

Workload Cost & Savings Calculator

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

Save 90% with Mistral Large 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
Mistral Large 3$160.00 / mo
In: $70Out: $90
Estimated Cost Delta

Mistral Large 3 is estimated to save $1,490.00/month ($17,880/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

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

Recommended Workload Routing

Repo / coding agentsMistral Large 3

Higher SWE-bench (55.4%).

High-volume chatMistral Large 3

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

Voice / low-latency UIMistral Large 3

Lower TTFT (190 ms).

Long-document RAGClaude 3 Opus

Larger window (200k).

Screenshots / visionMistral Large 3

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

Target WorkloadRecommended PickEvaluation Rationale
Repo / coding agentsMistral Large 3Higher SWE-bench (55.4%).
High-volume chatMistral Large 3Lower output list price ($6/1M).
Voice / low-latency UIMistral Large 3Lower TTFT (190 ms).
Long-document RAGClaude 3 OpusLarger window (200k).
Screenshots / visionMistral Large 3Both accept images. Defaulting to the higher-Elo side (Mistral Large 3).

Related Editorial Dispatches & Benchmark Notes

View all news
launchJan 18, 2026

Mistral Large 3: the European flagship with function calling

Jan 2026. Not the Elo crown. Useful when residency and tools matter more than Arena.

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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
Mistral

Mistral Large 3

Elo 1,456
SWE-bench55.4%
Speed (tok/s)112 tok/s
Input / 1M Tokens$2/1M
Output / 1M Tokens$6/1M

Frequently Asked Questions

Which is better overall, Claude 3 Opus or Mistral Large 3?
Mistral Large 3 has the higher preference Elo in our latest snapshot (1,456). “Better” still depends on coding, price, and latency — see the table.
Which is better at coding, Claude 3 Opus or Mistral Large 3?
Mistral Large 3 leads SWE-bench at 55.4% vs 38.4%. SWE-bench is one harness, not your repo.
Which is cheaper to run in production?
Mistral Large 3 output tokens are $6/1M versus $75/1M. Input prices and retry rates still move the real bill.
Which is faster, Claude 3 Opus or Mistral Large 3?
Mistral Large 3 has the lower time-to-first-token (190 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 128k.
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 Mistral Large 3 Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Related news

  • launch · Jan 18, 2026

    Mistral Large 3: the European flagship with function calling

Similar Head-to-Head Comparisons

All Claude 3 Opus matchups →|All Mistral Large 3 matchups →
Claude 3 Opus vs Claude Opus 4 (next opus)Mistral Large 3 vs Codestral 25.01 (previous mistral)Claude Opus 4.5 vs Mistral Large 3Claude Opus 4.6 vs Mistral Large 3Claude Sonnet 4.5 vs Mistral Large 3Claude Opus 5 vs Mistral Large 3