OpenRouter model
SpaceXAI: Grok 4.20
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...
- Provider
- OpenRouter
- Availability
- Available
- Model ID
- x-ai/grok-4.20
- Snapshot
- 2026-10-07
SpaceXAI: Grok 4.20 Benchmarks & Agentic Accuracy
Verified primary research & developer preference metrics
What This Means in Real Software Development
- 58.5% on SWE-bench Verified with strong multi-turn tool interaction.
- 76.0% on AIME 2024 and 71.0% on GPQA Diamond demonstrate advanced mathematical reasoning.
- Operates at ~65 TPS with native support for multi-agent DAG task programs.
- Available via xAI API and OpenRouter with full context retrieval.
Swarm Multi-Agent Topology
Best Paired With: Gemini 3.8 Flash for subagent execution
High deductive capability and broad context synthesis make it effective for complex planning.
Supervises worktree tasks and reviews git diffs before merging.
What Developers & Practitioners Are Saying
Real-world field observations, production strengths, and developer consensus
"xAI's frontier model featuring massive compute scale, unfiltered technical reasoning, and strong real-time data synthesis."
Verified Real-World Strengths
- High reasoning capacity on complex systems and hardware architecture
- Direct, no-nonsense technical responses with minimal refusal friction
- Strong mathematical foundation (76.5% AIME)
Production Caveats & Gaps
- Higher latency on reasoning queries
- API availability and tooling ecosystem still maturing compared to OpenAI/Anthropic
Primary Sources & Methodology Citations
- Grok 4.20 Architecture and Reasoning Benchmarks — xAI (October 2025)
Head-to-Head Frontier Comparisons: SpaceXAI: Grok 4.20 vs Rivals
Standardized, side-by-side benchmark & economics comparison against peer models
| Model | Role / Tier | SWE-bench | LiveCodeBench | LMSYS Elo | AIME | Input / Output |
|---|---|---|---|---|---|---|
SpaceXAI: Grok 4.20OpenRouterCurrent | Tier 1: Frontier Systems Specialist | 58.5% | 54.2% | 1375 | 76% | $2 / $8 |
Claude Opus 5.5Anthropic Compare SpaceXAI: Grok 4.20 vs Claude Opus 5.5 → | Tier 1: Master Principal Architect | 79.5% | 70.2% | 1450 | 92% | $15 / $75 |
OpenAI GPT-6 AstraOpenAI Compare SpaceXAI: Grok 4.20 vs OpenAI GPT-6 Astra → | Tier 1: Autonomous Chief Architect | 82% | 84.5% | 1470 | 97% | $6 / $24 |
Muse Spark 1.3Meta Compare SpaceXAI: Grok 4.20 vs Muse Spark 1.3 → | Tier 1: High-Speed Frontier Coder | 74.8% | 66.2% | 1420 | — | $1.2 / $6 |
xAI Grok 4.7xAI Compare SpaceXAI: Grok 4.20 vs xAI Grok 4.7 → | Tier 1: Algorithmic Reasoning Specialist | 73.6% | 64.9% | 1408 | — | $3 / $15 |
SpaceXAI: Grok 4.20 model overview
SpaceXAI: Grok 4.20 is listed in the public Swarm catalog through OpenRouter. This page summarizes the verified catalog fields used by Swarm without claiming real-time access for every provider account.
- Provider
- OpenRouter
- Family
- OpenRouter
- Context window
- 2M tokens
- Thinking support
- off
- Availability status
- Available
- Catalog ID
- openrouter/x-ai/grok-4.20
Run SpaceXAI: Grok 4.20 in Swarm
Verified CLI workflow & multi-agent architecture
swarm ctl model set --provider openrouter --model openrouter/x-ai/grok-4.20# Or switch interactively inside the terminal TUI:
/modelsSubagent Role Matrix
Assign SpaceXAI: Grok 4.20 to specialized system roles in ~/.swarm/config.json:
- Primary / Planner: Orchestrates full task DAGs and multi-stage pipelines.
- Coder Subagent: Generates code and unit tests inside private Git worktrees.
- Finder Subagent: Performs read-only code search, symbol discovery, and mapping.
Public catalog snapshot. Catalog availability is not a real-time provider status or an access guarantee.