| Signal | Grok Code Fast 1 | Delta | Qwen3.5 Plus 2026-04-20 |
|---|---|---|---|
Capabilities | 83 | -- | |
Pricing | 99 | +1 | |
Context window size | 86 | -9 | |
Recency | 86 | -14 | |
Output Capacity | 67 | -14 | |
| Overall Result | 1 wins | of 5 | 3 wins |
Score History
40
current score
Tied
right now
40
current score
xAI
Alibaba
Grok Code Fast 1 saves you $65.00/month
That's $780.00/year compared to Qwen3.5 Plus 2026-04-20 at your current usage level of 100K calls/month.
| Metric | Grok Code Fast 1 | Qwen3.5 Plus 2026-04-20 | Winner |
|---|---|---|---|
| Overall Score | 40 | 40 | -- |
| Rank | #257 | #198 | Qwen3.5 Plus 2026-04-20 |
| Quality Rank | #257 | #198 | Qwen3.5 Plus 2026-04-20 |
| Adoption Rank | #257 | #198 | Qwen3.5 Plus 2026-04-20 |
| Parameters | -- | -- | -- |
| Context Window | 256K | 1000K | Qwen3.5 Plus 2026-04-20 |
| Pricing | $0.20/$1.50/M | $0.40/$2.40/M | -- |
| Signal Scores | |||
| Capabilities | 83 | 83 | Grok Code Fast 1 |
| Pricing | 99 | 98 | Grok Code Fast 1 |
| Context window size | 86 | 95 | Qwen3.5 Plus 2026-04-20 |
| Recency | 86 | 100 | Qwen3.5 Plus 2026-04-20 |
| Output Capacity | 67 | 80 | Qwen3.5 Plus 2026-04-20 |
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 40/100 (rank #257), placing it in the top 12% of all 290 models tracked.
Scores 40/100 (rank #198), placing it in the top 32% 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.
Grok Code Fast 1 offers 39% better value per quality point. At 1M tokens/day, you'd spend $25.50/month with Grok Code Fast 1 vs $42.00/month with Qwen3.5 Plus 2026-04-20 - a $16.50 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 Code Fast 1 also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (1000K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($1.50/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (40/100) 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
Grok Code Fast 1 and Qwen3.5 Plus 2026-04-20 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.
Best for Quality
Grok Code Fast 1
Marginally better benchmark scores; both are excellent
Best for Cost
Grok Code Fast 1
39% lower pricing; better value at scale
Best for Reliability
Grok Code Fast 1
Higher uptime and faster response speeds
Best for Prototyping
Grok Code Fast 1
Stronger community support and better developer experience
Best for Production
Grok Code Fast 1
Wider enterprise adoption and proven at scale
by xAI
| Capability | Grok Code Fast 1 | Qwen3.5 Plus 2026-04-20 |
|---|---|---|
| Vision (Image Input)differs | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoning | ||
| Web Searchdiffers | ||
| Image Output |
xAI
Alibaba
Grok Code Fast 1 saves you $1.44/month
That's 40% cheaper than Qwen3.5 Plus 2026-04-20 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 | Grok Code Fast 1 | Qwen3.5 Plus 2026-04-20 |
|---|---|---|
| Context Window | 256K | 1M |
| Max Output Tokens | 10,000 | 65,536 |
| Open Source | No | No |
| Created | Aug 26, 2025 | Apr 27, 2026 |