| Signal | DeepSeek V4 Flash | Delta | GPT-5.5 Pro |
|---|---|---|---|
Capabilities | 67 | -33 | |
Benchmarks | 79 | -13 | |
Pricing | 100 | +95 | |
Context window size | 86 | -- | |
Recency | 100 | -- | |
Output Capacity | 80 | -5 | |
| Overall Result | 1 wins | of 6 | 3 wins |
Score History
77.2
current score
GPT-5.5 Pro
right now
90.3
current score
DeepSeek
OpenAI
DeepSeek V4 Flash saves you $11982.00/month
That's $143784.00/year compared to GPT-5.5 Pro at your current usage level of 100K calls/month.
| Metric | DeepSeek V4 Flash | GPT-5.5 Pro | Winner |
|---|---|---|---|
| Overall Score | 77 | 90 | GPT-5.5 Pro |
| Rank | #60 | #11 | GPT-5.5 Pro |
| Quality Rank | #60 | #11 | GPT-5.5 Pro |
| Adoption Rank | #60 | #11 | GPT-5.5 Pro |
| Parameters | -- | -- | -- |
| Context Window | 1049K | 1050K | GPT-5.5 Pro |
| Pricing | $0.09/$0.18/M | $30.00/$180.00/M | -- |
| Signal Scores | |||
| Capabilities | 67 | 100 | GPT-5.5 Pro |
| Benchmarks | 79 | 92 | GPT-5.5 Pro |
| Pricing | 100 | 5 | DeepSeek V4 Flash |
| Context window size | 86 | 86 | DeepSeek V4 Flash |
| Recency | 100 | 100 | DeepSeek V4 Flash |
| Output Capacity | 80 | 85 | GPT-5.5 Pro |
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 77/100 (rank #60), placing it in the top 80% of all 290 models tracked.
Scores 90/100 (rank #11), placing it in the top 97% of all 290 models tracked.
GPT-5.5 Pro has a 13-point advantage, which typically translates to noticeably better performance on complex reasoning, code generation, and multi-step tasks.
DeepSeek V4 Flash offers 100% better value per quality point. At 1M tokens/day, you'd spend $4.05/month with DeepSeek V4 Flash vs $3150.00/month with GPT-5.5 Pro - a $3145.95 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. DeepSeek V4 Flash also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (1050K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($0.18/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (90/100) 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-5.5 Pro clearly outperforms DeepSeek V4 Flash with a significant 13.099999999999994-point lead. For most general use cases, GPT-5.5 Pro is the stronger choice. However, DeepSeek V4 Flash may still excel in niche scenarios.
Best for Quality
DeepSeek V4 Flash
Marginally better benchmark scores; both are excellent
Best for Cost
DeepSeek V4 Flash
100% lower pricing; better value at scale
Best for Reliability
DeepSeek V4 Flash
Higher uptime and faster response speeds
Best for Prototyping
DeepSeek V4 Flash
Stronger community support and better developer experience
Best for Production
DeepSeek V4 Flash
Wider enterprise adoption and proven at scale
by DeepSeek
| Capability | DeepSeek V4 Flash | GPT-5.5 Pro |
|---|---|---|
| Vision (Image Input)differs | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoning | ||
| Web Searchdiffers | ||
| Image Output |
DeepSeek
OpenAI
DeepSeek V4 Flash saves you $269.62/month
That's 100% cheaper than GPT-5.5 Pro 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 | DeepSeek V4 Flash | GPT-5.5 Pro |
|---|---|---|
| Context Window | 1.0M | 1.1M |
| Max Output Tokens | 65,536 | 128,000 |
| Open Source | Yes | No |
| Created | Apr 24, 2026 | Apr 24, 2026 |