Frontier Model Comparison

The leading AI models competing at the frontier — April 2026

Reasoning

Gemini 3.1 Pro

94.3% GPQA

Coding

Grok 4.20

75% SWE-Bench

Writing

Claude Opus 4.6

128K output

Value

Gemini 3.1 Pro

$2/$12 per 1M

All-Rounder

GPT-5.4

OpenAI · Mar 5, 2026

Coding (SWE-Bench)74.9%

Reasoning (GPQA)92.8%

Context

Input

$2.50

Output

$15

Best all-rounderNative computer useLargest ecosystem33% fewer factual errors

Best Writing

Claude Opus 4.6

Anthropic · Feb 5, 2026

Coding (SWE-Bench)74%

Reasoning (GPQA)91.3%

Context

Input

$15

Output

$75

Best writing quality128K output tokens14.5hr autonomous tasksAgentic coding

Best Reasoning

Gemini 3.1 Pro

Google DeepMind · Mar 20, 2026

Coding (SWE-Bench)72%

Reasoning (GPQA)94.3%

Context

Input

Output

$12

Best reasoningBest value pricing13/16 benchmarksMultimodal leader

Best Coding

Grok 4.20

xAI · Mar 22, 2026

Coding (SWE-Bench)75%

Reasoning (GPQA)91%

Context

256K

Input

Output

$15

Four-agent architectureTop coding scoresReal-time X data200K GPU cluster

Value Pick

Claude Sonnet 4.6

Anthropic · Feb 17, 2026

Coding (SWE-Bench)70%

Reasoning (GPQA)88%

Context

Input

Output

$15

Best value AnthropicMatches $15 flagships at $3Computer useDispatch

Open Source

Llama 4 Maverick

Meta · Apr 2025

Coding (SWE-Bench)65%

Reasoning (GPQA)85%

Context

10M

Input

Free

Output

Free

Open weights128 experts MoE10M context window650M+ downloads

The Verdict

Best All-Rounder

GPT-5.4

Largest ecosystem, fewest errors

Best for Coding

Grok 4.20

75% SWE-Bench, multi-agent

Best Reasoning + Value

Gemini 3.1 Pro

94.3% GPQA at $2/$12

Best for Writing + Agents

Claude Opus 4.6

128K output, 14.5hr autonomy

Benchmarks sourced from official releases and independent evaluations. Scores approximate; real-world performance varies by task.