# Grok 4.20 vs Muse Glimmer 30B > Side-by-side benchmark comparison for Grok 4.20 and Muse Glimmer 30B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks. - Canonical page: https://benchlm.ai/compare/grok-4-20-beta-vs-muse-glimmer-30b - Last updated: September 24, 2026 - Shared sourced benchmarks: 5 - HTML indexing: indexable - Ranking lane: BenchAlign v5.7 ## Quick Verdict Pick Grok 4.20 if you want the stronger benchmark profile. Muse Glimmer 30B 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 59.66 to 41.73. - The clearest category separation is in reasoning, where the averages are 41.1 for Grok 4.20 and 79.3 for Muse Glimmer 30B. - The biggest single benchmark swing is CharXiv in Multimodal & Grounded, with scores of 60.9% and 78.8%. - Muse Glimmer 30B 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 | Muse Glimmer 30B | |----------|----------|----------| | Creator | xAI | Meta | | Type | Proprietary | Open Weight | | Reasoning | Reasoning | Reasoning | | Context | 2M | 131K | | Overall Score | 59.66 | 41.73 | | Benchmarks Covered | 23 | 14 | | Pricing (input/output) | $2.00 / $6.00 | $0.00 / $0.00 | ## Category Breakdown ### Agentic - Winner: Directional only - Grok 4.20 public-lane score: 24.5 (Supported · #81/105) - Muse Glimmer 30B public-lane score: 27.6 (Estimated · #72/105) | Benchmark | Grok 4.20 | Muse Glimmer 30B | Winner | |-----------|-----------|-----------|--------| | Terminal-Bench 2.0 | 47.1% | Coming soon | Coming soon | | DeepSearchQA | 62.8% | 74.6% | Muse Glimmer 30B | | Gert Labs | 38.36% | Coming soon | Coming soon | | Terminal-Bench 2.1 (Vals) | 44.2% | Coming soon | Coming soon | | MCP Atlas | Coming soon | 75.5% | Coming soon | | skillsBench | Coming soon | 44.3% | Coming soon | | OSWorld-Verified | Coming soon | 65.9% | Coming soon | ### Coding - Winner: Directional only - Grok 4.20 public-lane score: 23.8 (Supported · #106/135) - Muse Glimmer 30B public-lane score: 36.3 (Estimated · #69/135) | Benchmark | Grok 4.20 | Muse Glimmer 30B | Winner | |-----------|-----------|-----------|--------| | LiveCodeBench Pro | 74.2% | Coming soon | Coming soon | | SWE-bench Verified | 76.7% | 76% | Grok 4.20 | | SWE-bench Pro | 51.8% | 51.2% | Grok 4.20 | | Vibe Code Bench | 4.06% | Coming soon | Coming soon | | LiveCodeBench (Vals) | 84.3% | Coming soon | Coming soon | | SWE-bench (Vals) | 72.2% | Coming soon | Coming soon | | Terminal-Bench 2.1 | Coming soon | 51.7% | Coming soon | | SciCode | Coming soon | 43.6% | Coming soon | ### Reasoning - Winner: Not comparable - Grok 4.20 public-lane score: 41.1 (Unranked · 2 rankable rows) - Muse Glimmer 30B public-lane score: 79.3 (Unranked · 2 rankable rows) | Benchmark | Grok 4.20 | Muse Glimmer 30B | Winner | |-----------|-----------|-----------|--------| | ARC-AGI-2 | 53.3% | Coming soon | Coming soon | | ARC-AGI-3 | 0.1% | Coming soon | Coming soon | ### Multimodal & Grounded - Winner: Muse Glimmer 30B - Grok 4.20 public-lane score: 34.6 (#45/50) - Muse Glimmer 30B public-lane score: 46.3 (#42/50) | Benchmark | Grok 4.20 | Muse Glimmer 30B | Winner | |-----------|-----------|-----------|--------| | MMMU-Pro | 75.2% | 74% | Grok 4.20 | | CharXiv | 60.9% | 78.8% | Muse Glimmer 30B | | ERQA | 54.1% | Coming soon | Coming soon | | SimpleVQA | 57.4% | Coming soon | Coming soon | | MedXpertQA (MM) | 65.8% | Coming soon | Coming soon | | ScreenSpot Pro | Coming soon | 75.4% | Coming soon | | OmniDocBench 1.5 | Coming soon | 75.8% | Coming soon | ### Knowledge - Winner: Directional only - Grok 4.20 public-lane score: 51 (Supported · #55/158) - Muse Glimmer 30B public-lane score: 43.9 (Estimated · #75/158) | Benchmark | Grok 4.20 | Muse Glimmer 30B | Winner | |-----------|-----------|-----------|--------| | GPQA-D | 88.5% | Coming soon | Coming soon | | HLE w/o tools | 31.6% | Coming soon | Coming soon | | HealthBench Hard | 20.3% | Coming soon | Coming soon | | MedXpertQA (Text) | 50.2% | Coming soon | Coming soon | | GPQA Diamond (Vals) | 88.6% | Coming soon | Coming soon | | MMLU-Pro (Vals) | 86.3% | Coming soon | Coming soon | ### Instruction Following - Winner: Not comparable - Grok 4.20 public-lane score: Coming soon - Muse Glimmer 30B public-lane score: 77.7 (#55/124) | Benchmark | Grok 4.20 | Muse Glimmer 30B | Winner | |-----------|-----------|-----------|--------| | IFBench | Coming soon | 77% | Coming soon | ### Mathematics - Winner: Not comparable - Grok 4.20 public-lane score: Coming soon - Muse Glimmer 30B public-lane score: 75.4 (Unranked · 1 rankable row) | Benchmark | Grok 4.20 | Muse Glimmer 30B | Winner | |-----------|-----------|-----------|--------| | AIME26 | Coming soon | 94.7% | Coming soon | ## FAQ ### Which is better overall, Grok 4.20 or Muse Glimmer 30B? Grok 4.20 is ahead overall on BenchLM right now. ### Where is the biggest gap between Grok 4.20 and Muse Glimmer 30B? The widest category gap is in reasoning, where the averages are 41.1 for Grok 4.20 and 79.3 for Muse Glimmer 30B. ### 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 Muse Glimmer 30B cover on BenchLM? Muse Glimmer 30B currently has 14 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) - [Muse Glimmer 30B vs Grok 4.20 Multi-agent](/compare/grok-4-20-multi-agent-beta-vs-muse-glimmer-30b) - [Grok 4.20 vs GPT-6 Astra](/compare/gpt-6-astra-vs-grok-4-20-beta) - [Muse Glimmer 30B vs GPT-6 Astra](/compare/gpt-6-astra-vs-muse-glimmer-30b) ## Explore More - [Grok 4.20 profile](/models/grok-4-20-beta) - [Muse Glimmer 30B profile](/models/muse-glimmer-30b) - [Compare Pricing](/llm-pricing) - [Alternative Finder](/tools/alternative-finder) - [LLM Selector](/tools/llm-selector) - [Overall Rankings](/best/overall)