Claude Sonnet 4.6 vs Grok 3 Mini

We compared Claude Sonnet 4.6 and Grok 3 Mini across our 12-test suite and reported ranks where available. In our testing, Sonnet wins five categories: strategic_analysis (Sonnet 5 vs Grok 3; Sonnet tied for 1st of 54), creative_problem_solving (5 vs 3; Sonnet tied for 1st of 54), safety_calibration (5 vs 2; Sonnet tied for 1st of 55, Grok rank 12 of 55), agentic_planning (5 vs 3; Sonnet tied for 1st of 54, Grok rank 42 of 54), and multilingual (5 vs 4; Sonnet tied for 1st of 55, Grok rank 36 of 55). Grok 3 Mini wins constrained_rewriting (4 vs Sonnet 3; Grok rank 6 of 53, Sonnet rank 31 of 53), meaning Grok is better at strict compression & hard character-limit tasks in our tests. Six benchmarks tie: structured_output (both 4; rank 26 of 54), tool_calling (both 5; tied for 1st of 54), faithfulness (both 5; tied for 1st of 55), classification (both 4; tied for 1st of 53), long_context (both 5; tied for 1st of 55), and persona_consistency (both 5; tied for 1st of 53). Practical interpretation: Sonnet's 5/5 on safety_calibration and agentic_planning indicates stronger refusal behavior and goal decomposition for complex, multi-step workflows; its top ranks on creative_problem_solving and strategic_analysis mean better non-obvious idea generation and nuanced tradeoffs. Grok's advantage in constrained_rewriting (4 vs 3) means it will produce tighter compressed text when you must hit hard limits. On external benchmarks, Sonnet scores 75.2% on SWE-bench Verified (Epoch AI), ranking 4 of 12, and 85.8% on AIME 2025 (Epoch AI), ranking 10 of 23 — we cite these external results as supplemental evidence of Sonnet's stronger coding/math performance. Grok has no external SWE-bench / AIME scores in the payload.

Pricing per the payload is per mTok: Claude Sonnet 4.6 charges $3 input / $15 output per mTok; Grok 3 Mini charges $0.30 input / $0.50 output per mTok (priceRatio 30). At 1M tokens/month (1,000 mTok): Sonnet input=$3,000; output=$15,000; a 50/50 split ≈ $9,000/month. Grok input=$300; output=$500; 50/50 ≈ $800/month. At 10M tokens (10,000 mTok): Sonnet ≈ $90,000/month (50/50), Grok ≈ $4,000/month. At 100M tokens: Sonnet ≈ $900,000/month, Grok ≈ $40,000/month. Who should care: high-volume production apps, startups, and anyone running real-time multi-user services — the cost gap turns Sonnet into a premium choice for mission-critical workflows, while Grok is the practical pick for cost-constrained deployments and experimental workloads.

Choose Claude Sonnet 4.6 if you need best-in-class safety calibration, agentic planning, creative problem solving, multilingual parity, or are building professional coding/agent workflows where quality and reliability justify higher costs. Choose Grok 3 Mini if budget is a primary constraint, you need fast logical reasoning and compact outputs, or your workload requires tight constrained_rewriting and long-context behavior at a fraction of the cost.