As of October 21, 2026, SpaceXAI Grok 4.20 ranks #67 of 213 models overall with 25.7 on the Artificial Analysis Intelligence Index. Its strongest category is reasoning, where it ranks #52 of 203. SpaceXAI Grok 4.20 costs $1.25 per million input tokens and $2.50 per million output tokens. It was released on March 31, 2026.
Its output price ranks 209 of 349 priced models, counting from the cheapest.
Grok 4.20 is a reasoning model from SpaceXAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering...
x-ai/grok-4.20 The tick on a coding bar is the median of every model measured on it. Outside coding, the place is this model's rank on that board. A board that never ran the model says so.
Measured in 3 of 6 categories. A place counts only the models measured on that board.
No coding benchmark has measured this model, so there is no index. We do not estimate one from its price, its maker or its siblings. How it is weighted
Not measured on SWE-bench Lite, SWE-bench (full test set), SWE-bench Multimodal, SWE-bench Multilingual, AA Coding Index, Terminal-Bench 4 (Vals AI), ProgramBench (Vals AI), IOI (Vals AI), SWE-bench Multimodal (Vals AI), Vibe Code Bench 1-100 (Vals AI), SkillsBench (Vals AI), CyberBench (Vals AI), LiveCodeBench (Artificial Analysis run), SciCode, DeepSWE, FrontierCode, FrontierSWE, GSO-Bench, MirrorCode, Cybench, ALE-Bench, LMArena Text: coding, LMArena Text: software and IT, LMArena WebDev: React, LMArena WebDev: HTML, LMArena WebDev: from an image
Not measured on AA Agentic Index, Design Arena: agents building games, Design Arena: PowerPoint slides, Design Arena: spreadsheets, LiveBench research, LiveBench browser, LiveBench long agentic, SREBench (Vals AI), Harvey's Legal Agent Benchmark (Vals AI), BioMysteryBench (Vals AI), Terminal-Bench-Science (Vals AI), Vals Science Index, Time Horizon Index (Vals AI), CUA-bench (Vals AI), Robo-bench (Vals AI), APEX-Agents, METR time horizons, Remote Labor Index, GDPval, OSWorld 2.0, BALROG, DeepResearch Bench, PostTrainBench, TheAgentCompany, OSWorld, SpireClimb, LMArena Search
Not measured on LiveBench reasoning, MysteryMechanism (Vals AI), GPQA Diamond (Epoch AI run), Humanity's Last Exam, SimpleBench, Chess puzzles, Mystery game puzzles, EBR-bench, VPCT, BIG-Bench Hard, LMArena Text: hard prompts, LMArena Text: expert, LMArena Text: hard prompts in English, LMArena Vision: diagrams, LMArena Vision: homework
Not measured on MATH 500 (Vals AI), MGSM (Vals AI), AA Math Index, AIME 2025 (Artificial Analysis run), OTIS Mock AIME, FrontierMath, tiers 1 to 3, FrontierMath, tier 4, ProofBench, MATH level 5, GSM8K, LMArena Text: math, LMArena Text: mathematical work
Not measured on MMLU Pro (Artificial Analysis run), SimpleQA Verified, MMLU, GeoBench, AI2 Reasoning Challenge, LMArena Text: science, LMArena Text: medicine and healthcare, LMArena Text: legal and government, LMArena Text: business and finance
Not measured on LiveBench design
Not measured on Vals Index, LiveBench data analysis, Public Benefits Bench (Vals AI), Fiction.LiveBench, Creative writing (Lech Mazur), Surface Evolver Bench, Furniture assembly, ExploitBench, HellaSwag, WinoGrande, PIQA, LMArena Text, LMArena Text: instruction following, LMArena Text: creative writing, LMArena Vision, LMArena Text: English, LMArena Text: non-English, LMArena Text: Chinese, LMArena Text: German, LMArena Text: Japanese, LMArena Text: Korean, LMArena Text: French, LMArena Text: Spanish, LMArena Text: Russian, LMArena Text: Polish, LMArena Text: multi-turn, LMArena Text: longer queries, LMArena Text: writing and language, LMArena Text: entertainment and media, LMArena Vision: English, LMArena Vision: Chinese, LMArena Vision: reading text, LMArena Vision: humor, LMArena Vision: captioning, LMArena Vision: recognizing things, LMArena Vision: creative writing, LMArena Document
Not measured on Design Arena: images, Design Arena: graphic design, Design Arena: logos, LMArena Text to Image, LMArena Image Edit
Public boards shown as published (Vals AI, Artificial Analysis, Design Arena) and kept out of the coding index. Each links to its source on the benchmark page.
| Benchmark | Result | Index weight |
|---|---|---|
| Aider polyglotCoding | Not measured | 35% |
| SWE-bench VerifiedCoding | Not measured | 30% |
| SWE-bench LiteCoding | Not measured | Not in index |
| SWE-bench (full test set)Coding | Not measured | Not in index |
| SWE-bench MultimodalCoding | Not measured | Not in index |
| SWE-bench MultilingualCoding | Not measured | Not in index |
| LiveBench codingCoding | Not measured | 20% |
| LMArena WebDevCoding | Not measured | 15% |
| Vals IndexGeneral | Not measured | Not in index |
| GPQA DiamondReasoning | 88.6% | Not in index |
| AIMEMath | 96.5% | Not in index |
| MMLU ProKnowledge | 86.3% | Not in index |
| AA Intelligence IndexIntelligence | 25.7 | Not in index |
| AA Coding IndexCoding | Not measured | Not in index |
| AA Agentic IndexAgentic work | Not measured | Not in index |
| Design Arena: websitesWeb design | 1231 | Not in index |
| Design Arena: UI componentsWeb design | 1199 | Not in index |
| Design Arena: game devWeb design | 1192 | Not in index |
| Design Arena: data vizWeb design | 1217 | Not in index |
| Design Arena: 3DWeb design | 1194 | Not in index |
| Design Arena: all code categoriesWeb design | 1222 | Not in index |
| Design Arena: SVGWeb design | 1164 | Not in index |
| Design Arena: ASCII artWeb design | 1175 | Not in index |
| Design Arena: agents building web appsAgentic work | 1143 | Not in index |
| Design Arena: agents building full-stack appsAgentic work | 1054 | Not in index |
| Design Arena: agents building mobile appsAgentic work | 1089 | Not in index |
| Design Arena: agents building Android appsAgentic work | 1051 | Not in index |
| Design Arena: agents building Godot gamesAgentic work | 1089 | Not in index |
| Design Arena: agents building gamesAgentic work | Not measured | Not in index |
| Design Arena: HTML slidesAgentic work | 1180 | Not in index |
| Design Arena: PowerPoint slidesAgentic work | Not measured | Not in index |
| Design Arena: spreadsheetsAgentic work | Not measured | Not in index |
| Design Arena: imagesImage generation | Not measured | Not in index |
| Design Arena: graphic designImage generation | Not measured | Not in index |
| Design Arena: logosImage generation | Not measured | Not in index |
| LiveBench reasoningReasoning | Not measured | Not in index |
| LiveBench data analysisGeneral | Not measured | Not in index |
| LiveBench researchAgentic work | Not measured | Not in index |
| LiveBench browserAgentic work | Not measured | Not in index |
| LiveBench long agenticAgentic work | Not measured | Not in index |
| LiveBench designWeb design | Not measured | Not in index |
| LiveCodeBench (Vals AI)Coding | 84.3% | Not in index |
| SWE-bench Verified (Vals AI)Coding | 72.2% | Not in index |
| Terminal-Bench 4 (Vals AI)Coding | Not measured | Not in index |
| Vibe Code Bench (Vals AI)Coding | 4.1% | Not in index |
| Code migration (Vals AI)Coding | 0.3% | Not in index |
| ProgramBench (Vals AI)Coding | Not measured | Not in index |
| SREBench (Vals AI)Agentic work | Not measured | Not in index |
| IOI (Vals AI)Coding | Not measured | Not in index |
| Terminal-Bench 2.1 (Vals AI)Coding | 44.2% | Not in index |
| SWE-bench Multimodal (Vals AI)Coding | Not measured | Not in index |
| Vibe Code Bench 1-100 (Vals AI)Coding | Not measured | Not in index |
| SkillsBench (Vals AI)Coding | Not measured | Not in index |
| CyberBench (Vals AI)Coding | Not measured | Not in index |
| Finance Agent (Vals AI)Agentic work | 28.5% | Not in index |
| Tax Agent Bench (Vals AI)Agentic work | 7.0% | Not in index |
| Legal Research Bench (Vals AI)Agentic work | 13.9% | Not in index |
| Harvey's Legal Agent Benchmark (Vals AI)Agentic work | Not measured | Not in index |
| Excel Modeling Benchmark (Vals AI)Agentic work | 11.7% | Not in index |
| BioMysteryBench (Vals AI)Agentic work | Not measured | Not in index |
| Terminal-Bench-Science (Vals AI)Agentic work | Not measured | Not in index |
| Vals Science IndexAgentic work | Not measured | Not in index |
| Time Horizon Index (Vals AI)Agentic work | Not measured | Not in index |
| CUA-bench (Vals AI)Agentic work | Not measured | Not in index |
| Robo-bench (Vals AI)Agentic work | Not measured | Not in index |
| Public Benefits Bench (Vals AI)General | Not measured | Not in index |
| MysteryMechanism (Vals AI)Reasoning | Not measured | Not in index |
| MMMU Pro (Vals AI)Reasoning | 83.5% | Not in index |
| MATH 500 (Vals AI)Math | Not measured | Not in index |
| MGSM (Vals AI)Math | Not measured | Not in index |
| SAGE (Vals AI)General | 38.2% | Not in index |
| LegalBench (Vals AI)Knowledge | 77.7% | Not in index |
| CaseLaw (Vals AI)Knowledge | 54.4% | Not in index |
| CorpFin (Vals AI)Knowledge | 63.7% | Not in index |
| TaxEval (Vals AI)Knowledge | 74.1% | Not in index |
| MortgageTax (Vals AI)Knowledge | 45.4% | Not in index |
| MedQA (Vals AI)Knowledge | 94.5% | Not in index |
| MedCode (Vals AI)Knowledge | 32.2% | Not in index |
| MedScribe (Vals AI)General | 63.4% | Not in index |
| Vals Multimodal IndexGeneral | 39.1% | Not in index |
| AA Math IndexMath | Not measured | Not in index |
| GPQA Diamond (Artificial Analysis run)Reasoning | 91.1% | Not in index |
| Humanity's Last Exam (Artificial Analysis run)Reasoning | 34.5% | Not in index |
| MMLU Pro (Artificial Analysis run)Knowledge | Not measured | Not in index |
| LiveCodeBench (Artificial Analysis run)Coding | Not measured | Not in index |
| SciCodeCoding | Not measured | Not in index |
| Terminal-Bench Hard (Artificial Analysis run)Coding | 37.9% | Not in index |
| IFBenchGeneral | 81.2% | Not in index |
| Long context reasoning (AA-LCR)General | 69.0% | Not in index |
| τ²-Bench TelecomAgentic work | 93.0% | Not in index |
| AIME 2025 (Artificial Analysis run)Math | Not measured | Not in index |
| Terminal-BenchCoding | 57.3% | Not in index |
| DeepSWECoding | Not measured | Not in index |
| FrontierCodeCoding | Not measured | Not in index |
| FrontierSWECoding | Not measured | Not in index |
| GSO-BenchCoding | Not measured | Not in index |
| WeirdMLCoding | 52.3% | Not in index |
| MirrorCodeCoding | Not measured | Not in index |
| APEX-AgentsAgentic work | Not measured | Not in index |
| METR time horizonsAgentic work | Not measured | Not in index |
| Remote Labor IndexAgentic work | Not measured | Not in index |
| GDPvalAgentic work | Not measured | Not in index |
| OSWorld 2.0Agentic work | Not measured | Not in index |
| BALROGAgentic work | Not measured | Not in index |
| DeepResearch BenchAgentic work | Not measured | Not in index |
| PostTrainBenchAgentic work | Not measured | Not in index |
| GPQA Diamond (Epoch AI run)Reasoning | Not measured | Not in index |
| ARC-AGIReasoning | 89.5% | Not in index |
| ARC-AGI-2Reasoning | 65.1% | Not in index |
| Humanity's Last ExamReasoning | Not measured | Not in index |
| SimpleBenchReasoning | Not measured | Not in index |
| Chess puzzlesReasoning | Not measured | Not in index |
| Mystery game puzzlesReasoning | Not measured | Not in index |
| EBR-benchReasoning | Not measured | Not in index |
| OTIS Mock AIMEMath | Not measured | Not in index |
| FrontierMath, tiers 1 to 3Math | Not measured | Not in index |
| FrontierMath, tier 4Math | Not measured | Not in index |
| ProofBenchMath | Not measured | Not in index |
| MATH level 5Math | Not measured | Not in index |
| GSM8KMath | Not measured | Not in index |
| SimpleQA VerifiedKnowledge | Not measured | Not in index |
| MMLUKnowledge | Not measured | Not in index |
| GeoBenchKnowledge | Not measured | Not in index |
| DTBenchGeneral | 90.1% | Not in index |
| LMCAGeneral | 38.7% | Not in index |
| Fiction.LiveBenchGeneral | Not measured | Not in index |
| Creative writing (Lech Mazur)General | Not measured | Not in index |
| CL-benchGeneral | 22.2% | Not in index |
| Surface Evolver BenchGeneral | Not measured | Not in index |
| Furniture assemblyGeneral | Not measured | Not in index |
| ExploitBenchGeneral | Not measured | Not in index |
| CybenchCoding | Not measured | Not in index |
| TheAgentCompanyAgentic work | Not measured | Not in index |
| OSWorldAgentic work | Not measured | Not in index |
| SpireClimbAgentic work | Not measured | Not in index |
| VPCTReasoning | Not measured | Not in index |
| BIG-Bench HardReasoning | Not measured | Not in index |
| AI2 Reasoning ChallengeKnowledge | Not measured | Not in index |
| HellaSwagGeneral | Not measured | Not in index |
| WinoGrandeGeneral | Not measured | Not in index |
| PIQAGeneral | Not measured | Not in index |
| CL-bench LifeGeneral | 11.9% | Not in index |
| ALE-BenchCoding | Not measured | Not in index |
| Vending-Bench 2Agentic work | $4,663 | Not in index |
| Epoch Capabilities IndexIntelligence | 152.1 | Not in index |
| LMArena TextGeneral | Not measured | Not in index |
| LMArena Text: codingCoding | Not measured | Not in index |
| LMArena Text: hard promptsReasoning | Not measured | Not in index |
| LMArena Text: mathMath | Not measured | Not in index |
| LMArena Text: instruction followingGeneral | Not measured | Not in index |
| LMArena Text: creative writingGeneral | Not measured | Not in index |
| LMArena VisionGeneral | Not measured | Not in index |
| LMArena Text: EnglishGeneral | Not measured | Not in index |
| LMArena Text: non-EnglishGeneral | Not measured | Not in index |
| LMArena Text: ChineseGeneral | Not measured | Not in index |
| LMArena Text: GermanGeneral | Not measured | Not in index |
| LMArena Text: JapaneseGeneral | Not measured | Not in index |
| LMArena Text: KoreanGeneral | Not measured | Not in index |
| LMArena Text: FrenchGeneral | Not measured | Not in index |
| LMArena Text: SpanishGeneral | Not measured | Not in index |
| LMArena Text: RussianGeneral | Not measured | Not in index |
| LMArena Text: PolishGeneral | Not measured | Not in index |
| LMArena Text: multi-turnGeneral | Not measured | Not in index |
| LMArena Text: longer queriesGeneral | Not measured | Not in index |
| LMArena Text: expertReasoning | Not measured | Not in index |
| LMArena Text: hard prompts in EnglishReasoning | Not measured | Not in index |
| LMArena Text: software and ITCoding | Not measured | Not in index |
| LMArena Text: mathematical workMath | Not measured | Not in index |
| LMArena Text: scienceKnowledge | Not measured | Not in index |
| LMArena Text: medicine and healthcareKnowledge | Not measured | Not in index |
| LMArena Text: legal and governmentKnowledge | Not measured | Not in index |
| LMArena Text: business and financeKnowledge | Not measured | Not in index |
| LMArena Text: writing and languageGeneral | Not measured | Not in index |
| LMArena Text: entertainment and mediaGeneral | Not measured | Not in index |
| LMArena WebDev: ReactCoding | Not measured | Not in index |
| LMArena WebDev: HTMLCoding | Not measured | Not in index |
| LMArena WebDev: from an imageCoding | Not measured | Not in index |
| LMArena Vision: EnglishGeneral | Not measured | Not in index |
| LMArena Vision: ChineseGeneral | Not measured | Not in index |
| LMArena Vision: reading textGeneral | Not measured | Not in index |
| LMArena Vision: diagramsReasoning | Not measured | Not in index |
| LMArena Vision: homeworkReasoning | Not measured | Not in index |
| LMArena Vision: humorGeneral | Not measured | Not in index |
| LMArena Vision: captioningGeneral | Not measured | Not in index |
| LMArena Vision: recognizing thingsGeneral | Not measured | Not in index |
| LMArena Vision: creative writingGeneral | Not measured | Not in index |
| LMArena SearchAgentic work | Not measured | Not in index |
| LMArena DocumentGeneral | Not measured | Not in index |
| LMArena Text to ImageImage generation | Not measured | Not in index |
| LMArena Image EditImage generation | Not measured | Not in index |
A list price says what a token costs. The cost per solved task says what a working answer costs, which is the number that decides.
Beside a result, many boards publish what the run cost, how long it took, the tokens it spent or the votes behind a rating. Each figure as its board printed it, one board per row.
| Board | Result | What the run cost | Also published |
|---|---|---|---|
| SWE-bench Verified (Vals AI) | 72.2% | $0.52 per test | Duration, as printed 2m 15s |
| Vibe Code Bench (Vals AI) | 4.1% | $0.77 per test | Duration, as printed 5m 02s |
| Code migration (Vals AI) | 0.3% | $0.29 per test | Duration, as printed 6m 14s |
| Terminal-Bench 2.1 (Vals AI) | 44.2% | $0.41 per test | Duration, as printed 5m 06s |
| Finance Agent (Vals AI) | 28.5% | $0.79 per test | Duration, as printed 5m 51s |
| Tax Agent Bench (Vals AI) | 7.0% | $0.12 per test | Duration, as printed 1m 29s |
| Legal Research Bench (Vals AI) | 13.9% | $0.26 per test | Duration, as printed 4m 04s |
| Excel Modeling Benchmark (Vals AI) | 11.7% | $0.47 per test | Duration, as printed 6m 08s |
| Vals Multimodal Index | 39.1% | $0.40 per test | Duration, as printed 2m 51s |
| WeirdML | 52.3% | $0.1263 per run | Median lines of code 117 |
| ARC-AGI | 89.5% | $0.35 per task | Nothing else |
| ARC-AGI-2 | 65.1% | $0.92 per task | Nothing else |
| GPQA Diamond | 88.6% | Not published | Latency, as printed 59 s |
|---|---|---|---|
| AIME | 96.5% | Not published | Latency, as printed 1m 47s |
| MMLU Pro | 86.3% | Not published | Latency, as printed 12 s |
| LiveCodeBench (Vals AI) | 84.3% | Not published | Latency, as printed 1m 16s |
| MMMU Pro (Vals AI) | 83.5% | Not published | Latency, as printed 44 s |
| SAGE (Vals AI) | 38.2% | Not published | Latency, as printed 1m 06s |
| LegalBench (Vals AI) | 77.7% | Not published | Latency, as printed 7.6 s |
| CaseLaw (Vals AI) | 54.4% | Not published | Latency, as printed 11 s |
| CorpFin (Vals AI) | 63.7% | Not published | Latency, as printed 9.7 s |
| TaxEval (Vals AI) | 74.1% | Not published | Latency, as printed 13 s |
| MortgageTax (Vals AI) | 45.4% | Not published | Latency, as printed 11 s |
| MedQA (Vals AI) | 94.5% | Not published | Latency, as printed 12 s |
| MedCode (Vals AI) | 32.2% | Not published | Latency, as printed 17 s |
| MedScribe (Vals AI) | 63.4% | Not published | Latency, as printed 19 s |
No comparison page of its own yet: one needs a coding index on both sides, and Grok 4.20 has none. Compare Grok 4.20 with any model