GPT-5.1 vs Grok 4.20 Multi-Agent
| Signal | GPT-5.1 | Delta | Grok 4.20 Multi-Agent |
|---|---|---|---|
Capabilities | 100 | +17 | |
Benchmarks | 88 | +2 | |
Pricing | 90 | -7 | |
Context window size | 80 | -10 | |
Recency | 90 | -10 | |
Output Capacity | 85 | +65 | |
| Overall Result | 3 wins | of 6 | 3 wins |
Score History
87.4
current score
Tied
right now
87.4
current score
GPT-5.1
OpenAI
Grok 4.20 Multi-Agent
xAI
Grok 4.20 Multi-Agent saves you $375.00/month
That's $4500.00/year compared to GPT-5.1 at your current usage level of 100K calls/month.
| Metric | GPT-5.1 | Grok 4.20 Multi-Agent | Winner |
|---|---|---|---|
| Overall Score | 87 | 87 | -- |
| Rank | #25 | #23 | Grok 4.20 Multi-Agent |
| Quality Rank | #25 | #23 | Grok 4.20 Multi-Agent |
| Adoption Rank | #25 | #23 | Grok 4.20 Multi-Agent |
| Parameters | -- | -- | -- |
| Context Window | 400K | 2000K | Grok 4.20 Multi-Agent |
| Pricing | $1.25/$10.00/M | $1.25/$2.50/M | -- |
| Signal Scores | |||
| Capabilities | 100 | 83 | GPT-5.1 |
| Benchmarks | 88 | 86 | GPT-5.1 |
| Pricing | 90 | 98 | Grok 4.20 Multi-Agent |
| Context window size | 80 | 90 | Grok 4.20 Multi-Agent |
| Recency | 90 | 100 | Grok 4.20 Multi-Agent |
| Output Capacity | 85 | 20 | GPT-5.1 |
Our score (0-100) is driven by benchmark performance (90%) from Arena Elo ratings, MMLU, GPQA, HumanEval, SWE-bench, and 15+ standardized evaluations. Capabilities and context window serve as tiebreakers (10%). Learn more about our methodology.
Scores 87/100 (rank #25), placing it in the top 92% of all 290 models tracked.
Scores 87/100 (rank #23), placing it in the top 92% of all 290 models tracked.
With only a 0-point gap, these models are in the same performance tier. The practical difference in output quality is minimal - your choice should depend on pricing, latency requirements, and specific feature needs.
Choose GPT-5.1 when you need:
- Agentic applications using tool/function calling
- Step-by-step reasoning and chain-of-thought problem solving
Choose Grok 4.20 Multi-Agent when you need:
- High-volume production workloads where API costs must be minimized
- Processing long documents or large codebases (2000K token context)
- Step-by-step reasoning and chain-of-thought problem solving
Grok 4.20 Multi-Agent offers 67% better value per quality point. At 1M tokens/day, you'd spend $56.25/month with Grok 4.20 Multi-Agent vs $168.75/month with GPT-5.1 - a $112.50 monthly difference.
Both models have comparable response speeds. For most applications, the latency difference is negligible.
When latency matters most: Interactive chatbots, IDE code completion, real-time translation, and user-facing applications where response time directly impacts experience. For batch processing, background summarization, or offline analysis, latency is less critical.
Code generation & review
Based on overall model capabilities and architecture for coding tasks like generating functions, debugging, and refactoring
Customer support chatbot
Suitable for user-facing chat with competitive response times. Grok 4.20 Multi-Agent also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (2000K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($2.50/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (87/100) correlates with better nuance, coherence, and style in long-form content
Image understanding & OCR
Supports vision input - can analyze screenshots, diagrams, photos, and scanned documents directly
GPT-5.1 and Grok 4.20 Multi-Agent are extremely close in overall performance (only 0 points apart). Your best choice depends entirely on which specific strengths matter most for your use case.
By Use Case
Best for Quality
GPT-5.1
Marginally better benchmark scores; both are excellent
Best for Cost
Grok 4.20 Multi-Agent
67% lower pricing; better value at scale
Best for Reliability
GPT-5.1
Higher uptime and faster response speeds
Best for Prototyping
GPT-5.1
Stronger community support and better developer experience
Best for Production
GPT-5.1
Wider enterprise adoption and proven at scale
by OpenAI
- Choose for Quality - Marginally better benchmark scores; both are excellent
- Choose for Reliability - Higher uptime and faster response speeds
- Choose for Prototyping - Stronger community support and better developer experience
- Choose for Production - Wider enterprise adoption and proven at scale
| Capability | GPT-5.1 | Grok 4.20 Multi-Agent |
|---|---|---|
| Vision (Image Input) | ||
| Function Callingdiffers | ||
| Streaming | ||
| JSON Mode | ||
| Reasoning | ||
| Web Search | ||
| Image Output |
GPT-5.1
OpenAI
Grok 4.20 Multi-Agent
xAI
Grok 4.20 Multi-Agent saves you $9.00/month
That's 63% cheaper than GPT-5.1 at 1,000 tokens/request and 100 requests/day.
Assumes 60% input / 40% output token ratio per request. Actual costs may vary based on your usage pattern.
| Parameter | GPT-5.1 | Grok 4.20 Multi-Agent |
|---|---|---|
| Context Window | 400K | 2M |
| Max Output Tokens | 128,000 | -- |
| Open Source | No | No |
| Created | Nov 13, 2025 | Mar 31, 2026 |