Model comparison
GPT-5.5 vs DeepSeek V3.2
Compare GPT-5.5 vs DeepSeek V3.2 API pricing: input/output token costs, cache pricing, context windows, workload estimates, and routing fit.
GPT-5.5
openai · gpt-5.5
- Input
- $5
- Output
- $30
- Context
- 1.1M
DeepSeek V3.2
deepseek · deepseek/deepseek-v3.2
- Input
- $0.28
- Output
- $0.4
- Context
- 163.8K
Quick take
DeepSeek V3.2 has the lower input price at $0.28 per 1M input tokens. DeepSeek V3.2 is cheaper for the example blended workload below. GPT-5.5 has the larger context window at 1.1M tokens.
Choose GPT-5.5 if...
- GPT-5.5 is safer for long documents, repository analysis, and RAG prompts because it has the larger context window.
- GPT-5.5 is required if images, screenshots, or visual documents are part of the workflow.
Choose DeepSeek V3.2 if...
- DeepSeek V3.2 is the better default for cost-sensitive traffic and repeated high-volume calls.
- DeepSeek V3.2 gives more room for long generated answers, reports, or code output.
Example workload cost
Estimates use input tokens plus 20% output tokens. They exclude provider discounts, cache hits, and tool/search surcharges.
| Workload | GPT-5.5 | DeepSeek V3.2 | Cheaper |
|---|---|---|---|
| 1M input + 200K output | $11.00 | $0.36 | DeepSeek V3.2 |
| 10M input + 2M output | $110.00 | $3.60 | DeepSeek V3.2 |
| 100M input + 20M output | $1,100.00 | $36.00 | DeepSeek V3.2 |
Context, output, and capability fit
GPT-5.5 provides the larger context window. Check max output separately when the task needs long reports, code generation, or full-document rewrites.
- GPT-5.5 max output
- 128K
- DeepSeek V3.2 max output
- 163.8K
- GPT-5.5 features
- prompt caching, function calling, vision
- DeepSeek V3.2 features
- prompt caching, function calling
Risk notes for GPT-5.5
- High output price: cap max tokens for verbose generation workloads.
Risk notes for DeepSeek V3.2
- Smaller context window: long PDFs, codebases, or RAG prompts may need chunking.
Routing tags
frontierreasoningcodingagentslong-contextmultimodalcache-friendlyragbudgethigh-volumeopen-weightlocal-open