| Signal | Qwen3.5 Plus 2026-02-15 | Delta | Step 3.5 Flash |
|---|---|---|---|
Capabilities | 83 | +33 | |
Pricing | 2 | +1 | |
Context window size | 95 | +9 | |
Recency | 100 | -- | |
Output Capacity | 80 | -10 | |
Benchmarks | 0 | -65 | |
| Overall Result | 3 wins | of 6 | 2 wins |
30
days ranked higher
0
days
0
days ranked higher
Alibaba
StepFun
Step 3.5 Flash saves you $79.00/month
That's $948.00/year compared to Qwen3.5 Plus 2026-02-15 at your current usage level of 100K calls/month.
| Metric | Qwen3.5 Plus 2026-02-15 | Step 3.5 Flash | Winner |
|---|---|---|---|
| Overall Score | 85 | 73 | Qwen3.5 Plus 2026-02-15 |
| Rank | #30 | #127 | Qwen3.5 Plus 2026-02-15 |
| Quality Rank | #30 | #127 | Qwen3.5 Plus 2026-02-15 |
| Adoption Rank | #30 | #127 | Qwen3.5 Plus 2026-02-15 |
| Parameters | -- | -- | -- |
| Context Window | 1000K | 256K | Qwen3.5 Plus 2026-02-15 |
| Pricing | $0.26/$1.56/M | $0.10/$0.30/M | -- |
| Signal Scores | |||
| Capabilities | 83 | 50 | Qwen3.5 Plus 2026-02-15 |
| Pricing | 2 | 0 | Qwen3.5 Plus 2026-02-15 |
| Context window size | 95 | 86 | Qwen3.5 Plus 2026-02-15 |
| Recency | 100 | 100 | Qwen3.5 Plus 2026-02-15 |
| Output Capacity | 80 | 90 | Step 3.5 Flash |
| Benchmarks | -- | 65 | Step 3.5 Flash |
Our composite score (0–100) combines six weighted signals: benchmark performance (25%), pricing efficiency (25%), context window size (15%), model recency (15%), output capacity (10%), and capability versatility (10%). Here's what the scores mean for these two models:
Scores 85/100 (rank #30), placing it in the top 90% of all 290 models tracked.
Scores 73/100 (rank #127), placing it in the top 57% of all 290 models tracked.
Qwen3.5 Plus 2026-02-15 has a 12-point advantage, which typically translates to noticeably better performance on complex reasoning, code generation, and multi-step tasks.
Step 3.5 Flash offers 78% better value per quality point. At 1M tokens/day, you'd spend $6.00/month with Step 3.5 Flash vs $27.30/month with Qwen3.5 Plus 2026-02-15 - a $21.30 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
Higher benchmark score (0/100) indicates stronger performance on coding tasks like generating functions, debugging, and refactoring
Customer support chatbot
Faster response time (speed score 0/100) is critical for user-facing chat. Step 3.5 Flash 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 ($0.30/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (85/100) 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
Qwen3.5 Plus 2026-02-15 clearly outperforms Step 3.5 Flash with a significant 11.799999999999997-point lead. For most general use cases, Qwen3.5 Plus 2026-02-15 is the stronger choice. However, Step 3.5 Flash may still excel in niche scenarios.
Best for Quality
Qwen3.5 Plus 2026-02-15
Marginally better benchmark scores; both are excellent
Best for Cost
Step 3.5 Flash
78% lower pricing; better value at scale
Best for Reliability
Qwen3.5 Plus 2026-02-15
Higher uptime and faster response speeds
Best for Prototyping
Qwen3.5 Plus 2026-02-15
Stronger community support and better developer experience
Best for Production
Qwen3.5 Plus 2026-02-15
Wider enterprise adoption and proven at scale
by Alibaba
| Capability | Qwen3.5 Plus 2026-02-15 | Step 3.5 Flash |
|---|---|---|
| Vision (Image Input)differs | ||
| Function Calling | ||
| Streaming | ||
| JSON Modediffers | ||
| Reasoning | ||
| Web Search | ||
| Image Output |
Alibaba
StepFun
Step 3.5 Flash saves you $1.80/month
That's 77% cheaper than Qwen3.5 Plus 2026-02-15 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 | Qwen3.5 Plus 2026-02-15 | Step 3.5 Flash |
|---|---|---|
| Context Window | 1M | 256K |
| Max Output Tokens | 65,536 | 256,000 |
| Open Source | No | Yes |
| Created | Feb 16, 2026 | Jan 29, 2026 |
Qwen3.5 Plus 2026-02-15 scores 85/100 (rank #30) compared to Step 3.5 Flash's 73/100 (rank #127), giving it a 12-point advantage. Qwen3.5 Plus 2026-02-15 is the stronger overall choice, though Step 3.5 Flash may excel in specific areas like cost efficiency.
Qwen3.5 Plus 2026-02-15 is ranked #30 and Step 3.5 Flash is ranked #127 out of 290+ AI models. Rankings use a composite score combining benchmark performance (25%), pricing (25%), context window (15%), recency (15%), output capacity (10%), and versatility (10%). Scores update hourly.
Step 3.5 Flash is cheaper at $0.30/M output tokens vs Qwen3.5 Plus 2026-02-15's $1.56/M output tokens - 5.2x more expensive. Input token pricing: Qwen3.5 Plus 2026-02-15 at $0.26/M vs Step 3.5 Flash at $0.10/M.
Qwen3.5 Plus 2026-02-15 has a larger context window of 1,000,000 tokens compared to Step 3.5 Flash's 256,000 tokens. A larger context window means the model can process longer documents and conversations.