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Precision Benchmarks

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

Every score has a dated snapshot.

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  3. Claude 3 Opus vs Mistral: Mistral Medium 3.1

Pairwise benchmark snapshot · Aug 17, 2026noindex (thin pair)

Claude 3 Opus vs Mistral: Mistral Medium 3.1 benchmark

In this head-to-head showdown, Mistral: Mistral Medium 3.1 is more budget-friendly at $2/1M 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: Choose Claude 3 Opus if your priority is peak reasoning, complex code generation, and top preference Elo. Choose Mistral: Mistral Medium 3.1 if you are optimizing for low latency, high throughput, and cost-efficient API deployment.
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Executive Verdict Summary

Mistral: Mistral Medium 3.1 holds empirical advantage (2 of 3 metrics)

Coding / SWESWE-bench
Claude 3 OpusTop code solve rate
ReasoningGPQA / Live
Claude 3 OpusTop logical accuracy
Best Value$/1M Tok
Mistral: Mistral Medium 3.1Lowest API billing cost
Speed / TokTok/Sec
Claude 3 OpusFastest stream rate

Verified Advantage Breakdown

3 benchmarks evaluated across capability, speed, and cost

Claude 3 Opus (1)Mistral: Mistral Medium 3.1 (2)
Claude 3 Opus
1 of 3 Wins
✓Context window
Mistral: Mistral Medium 3.1
2 of 3 Wins
✓Input price✓Output price
Anthropic
Leads 1 of 3
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 2 of 3
Mistral: Mistral Medium 3.1

Auto-discovered from OpenRouter (mistralai/mistral-medium-3.1). Preview until a second source matches.

In: $0.4 · Out: $2/1M
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 Leader

No shared data

Single model data

Throughput Leader

No shared data

No latency data

Value per Dollar LeaderMistral: Mistral Medium 3.1 Wins

Mistral: Mistral Medium 3.1

$2 / 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 (7)vsMistral: Mistral Medium 3.1 (2)
Claude 3 Opus: 7W (78%)Overall: Claude 3 OpusMistral: Mistral Medium 3.1: 2W (22%)
← Claude 3 OpusMistral: Mistral Medium 3.1 →
🏆Claude 3 Opus Leads(4/5)

Intelligence & Reasoning

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

Benchmark
Claude 3 OpusvsMistral: Mistral Medium 3.1
Preference Elo
1,248vs—
Coding Elo
—vs—
SWE-bench
38.4%vs—
LiveBench
46.2%vs—
GPQA Diamond
50.4%vs—
Claude 3 Opus: 4WMistral: Mistral Medium 3.1: 0W
🏆Claude 3 Opus Leads(2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Benchmark
Claude 3 OpusvsMistral: Mistral Medium 3.1
Output speed
48 tok/svs—
Time to first token
420 msvs—
Claude 3 Opus: 2WMistral: Mistral Medium 3.1: 0W
🏆Mistral: Mistral Medium 3.1 Leads(2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Benchmark
Claude 3 OpusvsMistral: Mistral Medium 3.1
Output price
$75/1Mvs$2/1M+$73/1M
Input price
$15/1Mvs$0.4/1M+$14.6/1M
Context window
200kvs131k+69k
Claude 3 Opus: 1WMistral: Mistral Medium 3.1: 2W

Side-by-Side Benchmark Matrix

Claude 3 OpusMistral: Mistral Medium 3.1
Preference Elo
Claude 3 Opus1,248
Mistral: Mistral Medium 3.1—
LiveBench
Claude 3 Opus46.2%
Mistral: Mistral Medium 3.1—
SWE-bench
Claude 3 Opus38.4%
Mistral: Mistral Medium 3.1—
GPQA Diamond
Claude 3 Opus50.4%
Mistral: Mistral Medium 3.1—
Time to first token
Claude 3 Opus420 ms
Mistral: Mistral Medium 3.1—
Output speed
Claude 3 Opus48 tok/s
Mistral: Mistral Medium 3.1—
Input priceMistral: Mistral Medium 3.1 +$14.6/1M
Claude 3 Opus$15/1M
Mistral: Mistral Medium 3.1$0.4/1M
Output priceMistral: Mistral Medium 3.1 +$73/1M
Claude 3 Opus$75/1M
Mistral: Mistral Medium 3.1$2/1M
Context windowClaude 3 Opus +69k
Claude 3 Opus200k
Mistral: Mistral Medium 3.1131k
BenchmarkClaude 3 OpusMistral: Mistral Medium 3.1Advantage Delta
Preference Elo
1,248
lmarena · Aug 17, 2026
——
LiveBench
46.2%
livebench · Aug 17, 2026
——
SWE-bench
38.4%
swebench · Aug 17, 2026
——
GPQA Diamond
50.4%
seed-bootstrap · Aug 1, 2026
——
Time to first token
420 ms
seed-bootstrap · Aug 1, 2026
——
Output speed
48 tok/s
seed-bootstrap · Aug 1, 2026
——
Input price
$15/1M
seed-bootstrap · Aug 1, 2026
$0.4/1M
openrouter · Aug 17, 2026
+$14.6/1M
Output price
$75/1M
seed-bootstrap · Aug 1, 2026
$2/1M
openrouter · Aug 17, 2026
+$73/1M
Context window
200k
seed-bootstrap · Aug 1, 2026
131k
openrouter · Aug 17, 2026
+69k

Workload Cost & Savings Calculator

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

Save 97% with Mistral: Mistral Medium 3.1
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: Mistral Medium 3.1$44.00 / mo
In: $14Out: $30
Estimated Cost Delta

Mistral: Mistral Medium 3.1 is estimated to save $1,606.00/month ($19,272/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

  • 1
    Mistral: Mistral Medium 3.1:Pick Mistral: Mistral Medium 3.1 when you are optimizing output cost.

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatMistral: Mistral Medium 3.1

Lower output list price ($2/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGClaude 3 Opus

Larger window (200k).

Screenshots / visionClaude 3 Opus

Claude 3 Opus is the side marked multimodal in the catalog.

Target WorkloadRecommended PickEvaluation Rationale
Repo / coding agentsinsufficient dataNeed SWE-bench on both sides.
High-volume chatMistral: Mistral Medium 3.1Lower output list price ($2/1M).
Voice / low-latency UIinsufficient dataNeed TTFT on both sides.
Long-document RAGClaude 3 OpusLarger window (200k).
Screenshots / visionClaude 3 OpusClaude 3 Opus is the side marked multimodal in the catalog.

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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: Mistral Medium 3.1

Elo n/a
SWE-bench—
Speed (tok/s)131k
Input / 1M Tokens$0.4/1M
Output / 1M Tokens$2/1M

Frequently Asked Questions

Which is better overall, Claude 3 Opus or Mistral: Mistral Medium 3.1?
We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.
Which is better at coding, Claude 3 Opus or Mistral: Mistral Medium 3.1?
SWE-bench is missing for at least one model, so we do not rank coding from a single number.
Which is cheaper to run in production?
Mistral: Mistral Medium 3.1 output tokens are $2/1M versus $75/1M. Input prices and retry rates still move the real bill.
Which is faster, Claude 3 Opus or Mistral: Mistral Medium 3.1?
We do not have TTFT for both models.
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 Mistral: Mistral Medium 3.1 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 Mistral: Mistral Medium 3.1 matchups →
Claude 3 Opus vs Claude Opus 4 (next opus)Claude Opus 4.5 vs Claude 3 OpusClaude Opus 4.6 vs Claude 3 OpusClaude Sonnet 4.5 vs Claude 3 OpusMistral Large 3 vs Claude 3 OpusClaude Opus 5 vs Claude 3 Opus