# Grok 4.20 vs Inkling-Small > Side-by-side benchmark comparison for Grok 4.20 and Inkling-Small across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks. - Canonical page: https://benchlm.ai/compare/grok-4-20-beta-vs-inkling-small - Last updated: September 10, 2026 - Shared sourced benchmarks: 13 - HTML indexing: indexable - Ranking lane: BenchAlign v5 ## Quick Verdict Pick Grok 4.20 if you want the stronger benchmark profile. Inkling-Small only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score. ## Summary - Grok 4.20 leads overall 67.13 to 59.25. - The clearest category separation is in coding, where the averages are 28.2 for Grok 4.20 and 43.8 for Inkling-Small. - The biggest single benchmark swing is CharXiv in Multimodal & Grounded, with scores of 60.9% and 81.3%. - Inkling-Small is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use. - Grok 4.20 also has the larger context window at 2M. ## Model Snapshot | Property | Grok 4.20 | Inkling-Small | |----------|----------|----------| | Creator | xAI | Thinking Machines Lab | | Type | Proprietary | Open Weight | | Reasoning | Reasoning | Hybrid | | Context | 2M | 1M | | Overall Score | 67.13 | 59.25 | | Benchmarks Covered | 23 | 25 | | Pricing (input/output) | $2.00 / $6.00 | $0.58 / $1.44 | ## Category Breakdown ### Agentic - Winner: Inkling-Small - Grok 4.20 public-lane score: 26.7 (Supported · #145/152) - Inkling-Small public-lane score: 36.9 (Supported · #128/152) | Benchmark | Grok 4.20 | Inkling-Small | Winner | |-----------|-----------|-----------|--------| | Terminal-Bench 2.0 | 47.1% | 64.7% | Inkling-Small | | DeepSearchQA | 62.8% | Coming soon | Coming soon | | Gert Labs | 38.36% | Coming soon | Coming soon | | Terminal-Bench 2.1 (Vals) | 44.2% | 55.1% | Inkling-Small | | BrowseComp | Coming soon | 77.4% | Coming soon | | MCP Atlas | Coming soon | 79.6% | Coming soon | | Toolathlon-Verified | Coming soon | 54.4% | Coming soon | ### Coding - Winner: Inkling-Small - Grok 4.20 public-lane score: 28.2 (Supported · #141/151) - Inkling-Small public-lane score: 43.8 (Supported · #97/151) | Benchmark | Grok 4.20 | Inkling-Small | Winner | |-----------|-----------|-----------|--------| | LiveCodeBench Pro | 74.2% | Coming soon | Coming soon | | SWE-bench Verified | 76.7% | 80.2% | Inkling-Small | | SWE-bench Pro | 51.8% | 55.9% | Inkling-Small | | Vibe Code Bench | 4.06% | Coming soon | Coming soon | | LiveCodeBench (Vals) | 84.3% | 85.9% | Inkling-Small | | SWE-bench (Vals) | 72.2% | 82.2% | Inkling-Small | | Terminal-Bench 2.0 | Coming soon | 64.7% | Coming soon | | SciCode | Coming soon | 48.7% | Coming soon | ### Multimodal & Grounded - Winner: Inkling-Small - Grok 4.20 public-lane score: 34.6 (#43/48) - Inkling-Small public-lane score: 48.8 (#39/48) | Benchmark | Grok 4.20 | Inkling-Small | Winner | |-----------|-----------|-----------|--------| | MMMU-Pro | 75.2% | 74% | Grok 4.20 | | CharXiv | 60.9% | 81.3% | Inkling-Small | | ERQA | 54.1% | Coming soon | Coming soon | | SimpleVQA | 57.4% | Coming soon | Coming soon | | MedXpertQA (MM) | 65.8% | Coming soon | Coming soon | | CharXiv w/o tools | Coming soon | 77.4% | Coming soon | ### Reasoning - Winner: Coming soon - Grok 4.20 public-lane score: 34.2 (Unranked · 2 rankable rows) - Inkling-Small public-lane score: 42.7 (Unranked · 3 rankable rows) | Benchmark | Grok 4.20 | Inkling-Small | Winner | |-----------|-----------|-----------|--------| | ARC-AGI-2 | 53.3% | 40.1% | Grok 4.20 | | ARC-AGI-3 | 0.1% | Coming soon | Coming soon | | CritPt | Coming soon | 8.3% | Coming soon | ### Knowledge - Winner: Inkling-Small - Grok 4.20 public-lane score: 49.4 (Supported · #85/183) - Inkling-Small public-lane score: 56.5 (Supported · #46/183) | Benchmark | Grok 4.20 | Inkling-Small | Winner | |-----------|-----------|-----------|--------| | GPQA-D | 88.5% | 89.5% | Inkling-Small | | HLE w/o tools | 31.6% | 31.6% | Tie | | HealthBench Hard | 20.3% | Coming soon | Coming soon | | MedXpertQA (Text) | 50.2% | Coming soon | Coming soon | | GPQA Diamond (Vals) | 88.6% | 83.6% | Grok 4.20 | | MMLU-Pro (Vals) | 86.3% | 85.6% | Grok 4.20 | | GPQA | Coming soon | 89.5% | Coming soon | | HLE | Coming soon | 47.8% | Coming soon | ### Instruction Following - Winner: Coming soon - Grok 4.20 public-lane score: Coming soon - Inkling-Small public-lane score: 89.6 (#25/123) | Benchmark | Grok 4.20 | Inkling-Small | Winner | |-----------|-----------|-----------|--------| | IFBench | Coming soon | 82.2% | Coming soon | ### Mathematics - Winner: Coming soon - Grok 4.20 public-lane score: Coming soon - Inkling-Small public-lane score: 76.9 (Unranked · 2 rankable rows) | Benchmark | Grok 4.20 | Inkling-Small | Winner | |-----------|-----------|-----------|--------| | AIME26 | Coming soon | 95.5% | Coming soon | | HMMT Feb 2026 | Coming soon | 90.2% | Coming soon | ## FAQ ### Which is better overall, Grok 4.20 or Inkling-Small? Grok 4.20 is ahead overall on BenchLM right now. ### Where is the biggest gap between Grok 4.20 and Inkling-Small? The widest category gap is in coding, where the averages are 28.2 for Grok 4.20 and 43.8 for Inkling-Small. ### How many benchmarks does Grok 4.20 cover on BenchLM? Grok 4.20 currently has 23 sourced benchmark scores on BenchLM. ### How many benchmarks does Inkling-Small cover on BenchLM? Inkling-Small currently has 25 sourced benchmark scores on BenchLM. ## Related Comparisons - [Grok 4.20 vs Grok 4.20 Multi-agent](/compare/grok-4-20-beta-vs-grok-4-20-multi-agent-beta) - [Inkling-Small vs Grok 4.20 Multi-agent](/compare/grok-4-20-multi-agent-beta-vs-inkling-small) - [Grok 4.20 vs Inkling](/compare/grok-4-20-beta-vs-inkling) - [Inkling-Small vs Inkling](/compare/inkling-vs-inkling-small) ## Explore More - [Grok 4.20 profile](/models/grok-4-20-beta) - [Inkling-Small profile](/models/inkling-small) - [Compare Pricing](/llm-pricing) - [Alternative Finder](/tools/alternative-finder) - [LLM Selector](/tools/llm-selector) - [Overall Rankings](/best/overall)