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  3. Kimi Chat 1.5 vs Mistral Large 3

Pairwise benchmark snapshot · Aug 1, 2026

Kimi Chat 1.5 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 1,420), while Mistral Large 3 leads in SWE-bench software engineering benchmarks (55.4%), while Kimi Chat 1.5 is more budget-friendly at $0.8/1M per 1M output tokens, while Mistral Large 3 provides faster response streaming (112 tok/s). Review the complete breakdown below to determine which model best fits your performance and budget requirements.

Executive Comparison Verdict

Bottom Line: Choose Mistral Large 3 if your priority is peak reasoning, complex code generation, and top preference Elo. Choose Kimi Chat 1.5 if you are optimizing for low latency, high throughput, and cost-efficient API deployment.
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Verified Head-to-Head Advantage Breakdown

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

Kimi Chat 1.5 (3)Mistral Large 3 (6)
Kimi Chat 1.5
3 of 9 Wins
✓Input price✓Output price✓Context window
Mistral Large 3
6 of 9 Wins
✓Preference Elo✓LiveBench✓SWE-bench✓GPQA Diamond✓Time to first token✓Output speed
Moonshot
Leads 3 of 9 metrics
Kimi Chat 1.5

Moonshot ultra-long context model supporting up to 2 million tokens per request.

2M ContextElo 1,420$0.8/1M out
Mistral
Leads 6 of 9 metrics
Mistral Large 3

Mistral European flagship with strong function calling.

Elo 1,456$6/1M out

Kimi Series Lineage & Sibling Variants

4 models

Currently comparing Kimi Chat 1.5 vs Mistral Large 3. Alternative family tiers available.

Active: Kimi Chat 1.5
Kimi K3$2.5Kimi K2.5 Max$2Kimi K2$1.4
Top Rival Showdowns for Kimi Chat 1.5
All Matchups
Compare vs:vs Claude Opus 4.5vs GPT-5vs Gemini 3 Provs Grok 4.6vs DeepSeek V4 Pro
Preference LeaderMistral Large 3 Wins

Mistral Large 3

Δ 36 Arena Elo pts

Throughput LeaderMistral Large 3 Wins

Mistral Large 3

112 tok/s

Value per Dollar LeaderKimi Chat 1.5 Wins

Kimi Chat 1.5

$0.8 / 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.

Kimi Chat 1.5 (4)vsMistral Large 3 (6)
Kimi Chat 1.5: 4W (40%)Overall: Mistral Large 3Mistral Large 3: 6W (60%)
← Kimi Chat 1.5Mistral Large 3 →
🏆Mistral Large 3(4/5)

Intelligence & Reasoning

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

Benchmark
Kimi Chat 1.5vsMistral Large 3
Preference Elo
1,420vs1,456+36
Coding Elo
1,390vs—
SWE-bench
51%vs55.4%+4.4%
LiveBench
58%vs61.8%+3.8%
GPQA Diamond
71.5%vs74.1%+2.6%
Kimi Chat 1.5: 1WMistral Large 3: 4W
🏆Mistral Large 3(2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Benchmark
Kimi Chat 1.5vsMistral Large 3
Output speed
95 tok/svs112 tok/s+17 tok/s
Time to first token
210 msvs190 ms+20 ms
Kimi Chat 1.5: 0WMistral Large 3: 2W
🏆Kimi Chat 1.5(3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Benchmark
Kimi Chat 1.5vsMistral Large 3
Output price
$0.8/1Mvs$6/1M+$5.2/1M
Input price
$0.2/1Mvs$2/1M+$1.8/1M
Context window
2Mvs256k+1.7M
Kimi Chat 1.5: 3WMistral Large 3: 0W

Side-by-Side Benchmark Matrix

Preference Elo+36
Kimi Chat 1.51,420
seed-bootstrap · Aug 1, 2026
Mistral Large 31,456
seed-bootstrap · Aug 1, 2026
Coding Elo
Kimi Chat 1.51,390
seed-bootstrap · Aug 1, 2026
Mistral Large 3—
LiveBench+3.8%
Kimi Chat 1.558%
seed-bootstrap · Aug 1, 2026
Mistral Large 361.8%
seed-bootstrap · Aug 1, 2026
SWE-bench+4.4%
Kimi Chat 1.551%
seed-bootstrap · Aug 1, 2026
Mistral Large 355.4%
seed-bootstrap · Aug 1, 2026
GPQA Diamond+2.6%
Kimi Chat 1.571.5%
seed-bootstrap · Aug 1, 2026
Mistral Large 374.1%
seed-bootstrap · Aug 1, 2026
Time to first token+20 ms
Kimi Chat 1.5210 ms
seed-bootstrap · Aug 1, 2026
Mistral Large 3190 ms
seed-bootstrap · Aug 1, 2026
Output speed+17 tok/s
Kimi Chat 1.595 tok/s
seed-bootstrap · Aug 1, 2026
Mistral Large 3112 tok/s
seed-bootstrap · Aug 1, 2026
Input price+$1.8/1M
Kimi Chat 1.5$0.2/1M
seed-bootstrap · Aug 1, 2026
Mistral Large 3$2/1M
seed-bootstrap · Aug 1, 2026
Output price+$5.2/1M
Kimi Chat 1.5$0.8/1M
seed-bootstrap · Aug 1, 2026
Mistral Large 3$6/1M
seed-bootstrap · Aug 1, 2026
Context window+1.7M
Kimi Chat 1.52M
seed-bootstrap · Aug 1, 2026
Mistral Large 3256k
seed-bootstrap · Aug 1, 2026
BenchmarkKimi Chat 1.5Mistral Large 3Advantage Delta
Preference Elo
1,420
seed-bootstrap · Aug 1, 2026
1,456
seed-bootstrap · Aug 1, 2026
+36
Coding Elo
1,390
seed-bootstrap · Aug 1, 2026
——
LiveBench
58%
seed-bootstrap · Aug 1, 2026
61.8%
seed-bootstrap · Aug 1, 2026
+3.8%
SWE-bench
51%
seed-bootstrap · Aug 1, 2026
55.4%
seed-bootstrap · Aug 1, 2026
+4.4%
GPQA Diamond
71.5%
seed-bootstrap · Aug 1, 2026
74.1%
seed-bootstrap · Aug 1, 2026
+2.6%
Time to first token
210 ms
seed-bootstrap · Aug 1, 2026
190 ms
seed-bootstrap · Aug 1, 2026
+20 ms
Output speed
95 tok/s
seed-bootstrap · Aug 1, 2026
112 tok/s
seed-bootstrap · Aug 1, 2026
+17 tok/s
Input price
$0.2/1M
seed-bootstrap · Aug 1, 2026
$2/1M
seed-bootstrap · Aug 1, 2026
+$1.8/1M
Output price
$0.8/1M
seed-bootstrap · Aug 1, 2026
$6/1M
seed-bootstrap · Aug 1, 2026
+$5.2/1M
Context window
2M
seed-bootstrap · Aug 1, 2026
256k
seed-bootstrap · Aug 1, 2026
+1.7M
Interactive Simulator (USD)

Workload Cost & Savings Calculator

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

Save up to 88% with Kimi Chat 1.5
Monthly Volume50M tokens/mo
Quick Presets:
Token Ratio (In vs Out)70% In / 30% Out
RAG / Search (10% out)Coding / Chat (50% out)
Kimi Chat 1.5$19.00 / mo
In: $7Out: $12
Mistral Large 3$160.00 / mo
In: $70Out: $90
Estimated Cost Delta

Kimi Chat 1.5 is estimated to save $141.00/month ($1,692/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
    Kimi Chat 1.5:Pick Kimi Chat 1.5 when you are optimizing output cost.
  • 3
    Mistral Large 3:Pick Mistral Large 3 when time-to-first-token matters more than peak Elo.

Recommended Workload Routing

Repo / coding agentsMistral Large 3

Higher SWE-bench (55.4%).

High-volume chatKimi Chat 1.5

Lower output list price ($0.8/1M).

Voice / low-latency UIMistral Large 3

Lower TTFT (190 ms).

Long-document RAGKimi Chat 1.5

Larger window (2M).

Screenshots / visionMistral Large 3

Mistral Large 3 is the side marked multimodal in the catalog.

Target WorkloadRecommended PickEvaluation Rationale
Repo / coding agentsMistral Large 3Higher SWE-bench (55.4%).
High-volume chatKimi Chat 1.5Lower output list price ($0.8/1M).
Voice / low-latency UIMistral Large 3Lower TTFT (190 ms).
Long-document RAGKimi Chat 1.5Larger window (2M).
Screenshots / visionMistral Large 3Mistral Large 3 is the side marked multimodal in the catalog.

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.

Community Sentiment

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CompareLLM AI Matrix

Verified Head-to-Head Telemetry

LIVE BENCHMARK
VS
Moonshot

Kimi Chat 1.5

Elo 1,420
SWE-bench51%
Speed (tok/s)95 tok/s
Input / 1M Tokens$0.2/1M
Output / 1M Tokens$0.8/1M
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, Kimi Chat 1.5 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, Kimi Chat 1.5 or Mistral Large 3?
Mistral Large 3 leads SWE-bench at 55.4% vs 51%. SWE-bench is one harness, not your repo.
Which is cheaper to run in production?
Kimi Chat 1.5 output tokens are $0.8/1M versus $6/1M. Input prices and retry rates still move the real bill.
Which is faster, Kimi Chat 1.5 or Mistral Large 3?
Mistral Large 3 has the lower time-to-first-token (190 ms vs 210 ms). Tokens/sec is a separate column if you care about long completions.
Which has the larger context window?
Kimi Chat 1.5 accepts 2M tokens versus 256k.
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. Kimi Chat 1.5 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 Kimi Chat 1.5 matchups →|All Mistral Large 3 matchups →
Kimi Chat 1.5 vs Kimi K2 (next kimi)Mistral Large 3 vs Codestral 25.01 (previous mistral)Kimi K2.5 Max vs Mistral Large 3Kimi K3 vs Mistral Large 3Kimi K2 vs Mistral Large 3Codestral 25.01 vs Kimi Chat 1.5