Best AI Models for Reasoning in 2026

We test AI models on complex reasoning tasks—tradeoff analysis, strategic planning, root cause diagnosis—so you can find the model that thinks most clearly.

Reasoning benchmarksSource reviewedAnalysis depth

Reasoning Leaderboard

Feb 2026
1
Claude Opus 4.8
9.4
2
Kimi K3
9.2
3
GLM-5
8.6
4
GPT-5.5
8.5
5
Gemini 3.1 Pro Preview
8.4

Reasoning Model Rankings

Performance scores, pricing, and context windows for reasoning-focused tasks.

RankModelScorePricing ($/M)ContextKey Strengths
#1
Claude Opus 4.8
Anthropic
9.4/10$5 / $251MBest at nuanced analysis • Excellent tradeoff evaluation • Strong strategic thinking
#2
Kimi K3
Moonshot
9.2/10$3 / $151MConfigurable reasoning effort • Native visual understanding • 1M context
#3
GLM-5
Zhipu AI
8.6/10$0.5 / $0.5128KStrong analysis • Ultra-low cost • Enterprise ready
#4
GPT-5.5
OpenAI
8.5/10$5 / $301MGood general reasoning • Fast responses • Strong ecosystem
#5
Gemini 3.1 Pro Preview
Google
8.4/10$2 / $121MMassive context • Research synthesis • Good multimodal
#6
MiniMax M2.5
MiniMax
8.3/10$0.5 / $2245KBudget option • Fast inference • Good for scale

Benchmark Breakdown

How top models perform across specific reasoning tasks (scale: 1-10).

TaskDescriptionClaudeKimiGLM-5GPT
Tradeoff AnalysisEvaluating pros/cons of technical decisions9.59.38.78.4
Root Cause AnalysisDiagnosing problems from symptoms9.49.18.58.6
Strategic PlanningMulti-step plans with dependencies9.39.28.48.3
Logical DeductionFollowing logical chains to conclusions9.29.48.88.5
Risk AssessmentIdentifying and prioritizing risks9.48.98.58.2
Comparative AnalysisComparing options against criteria9.598.68.5

When to Use Which Model

Decision guide for picking the right reasoning model for your situation.

Executive decision support

Claude Opus 4.8

Best at nuanced analysis and presenting tradeoffs clearly. Excels at "it depends" scenarios.

Technical architecture decisions

Claude Opus 4.8

Deep understanding of system design tradeoffs and can articulate long-term implications.

Long-context analysis tasks

Kimi K3

Kimi K3 supports configurable reasoning effort and a 1M-token context window.

Budget-constrained projects

GLM-5

Solid reasoning capability at $0.50/$0.50 per million tokens. Best value for analysis tasks.

Research synthesis

Gemini 3.1 Pro Preview

1M context window lets you include extensive background material for comprehensive analysis.

Frequently Asked Questions

What is the best AI model for reasoning in 2026?

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The right choice depends on your task, evaluation setup, cost ceiling, and deployment constraints. Our displayed scores are editorial fit scores, not universal benchmark results; compare source-backed specifications and test finalists on representative work.

What tasks count as "reasoning" in your benchmarks?

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We test: tradeoff analysis (comparing options), root cause analysis (diagnosing problems), strategic planning (multi-step plans), logical deduction (following chains), risk assessment, and comparative analysis against criteria.

Why does Claude excel at reasoning?

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Claude tends to acknowledge uncertainty, present multiple perspectives, and avoid overconfident assertions. It excels at "it depends" scenarios where context matters more than binary answers.

Is reasoning capability worth paying more for?

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For critical decisions, yes. Better reasoning means fewer costly mistakes and more thorough analysis. For routine tasks, models like Kimi or GLM offer strong reasoning at lower cost.

How do I test reasoning quality myself?

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Give models ambiguous scenarios with no clear right answer. Better reasoning models will acknowledge tradeoffs, ask clarifying questions, and present balanced perspectives rather than confident wrong answers.

See Full Daily Scorecards

Get detailed task-level breakdowns, failure cases, and cost analysis for every model we test.

View scorecards