API cost decision in 10 seconds
GPT Chat Latest vs 🔥DeepSeek V4 Flash
Pick DeepSeek V4 Flash when budget and context both matter.
Pricing data updated:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick DeepSeek V4 Flash when budget and context both matter.
On the standard 1M input plus 500K output workload, DeepSeek V4 Flash is estimated at $0.2 vs $20 for GPT Chat Latest, saving $19.8 (99% lower).
Cost-first pickDeepSeek V4 Flash
Context-first pickDeepSeek V4 Flash
Sample savings$19.899%
10x traffic gap$198
DeepSeek V4 Flash is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $198. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
DeepSeek V4 Flash stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | GPT Chat Latest | DeepSeek V4 Flash |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | DeepSeek V4 Flash | $40 | $0.6 |
| Balanced workload | 1M input + 1M output | DeepSeek V4 Flash | $35 | $0.3 |
| Output-heavy chatbot | 1M input + 5M output | DeepSeek V4 Flash | $155 | $1.1 |
Estimate your workload cost
Your Workload Cost
This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.
Quick Decision
DeepSeek V4 Flash has the lower input price, DeepSeek V4 Flash has the lower output price, and DeepSeek V4 Flash offers the larger context window.
For a 1M input token plus 500K output token workload, the estimated API cost is $20 for GPT Chat Latest and $0.2 for DeepSeek V4 Flash.
Choose GPT Chat Latest when its provider, model quality, latency, or availability is more important than the numeric price/context winner.
Choose DeepSeek V4 Flash when you care most about lower input-token price, lower output-token price, and larger context window.
| Feature | GPT Chat Latest (OpenAI) | 🔥DeepSeek V4 Flash (DeepSeek) |
|---|---|---|
| Input Price prompt tokens per 1M | $5 | $0.1 |
| Completion Price per 1M tokens | $30 | $0.2 |
| Sample Workload Cost 1M input + 500K output | $20 | $0.2 |
| Context Window | 400K | 1.05M |
| Release Date | 2026-05-05 | 2026-04-24 |
| Popularity | #1 |
GPT Chat Latest points to OpenAI's stable API alias `chat-latest` that always resolves to the latest Instant chat model used in ChatGPT. As OpenAI rolls out new Instant model updates...
DeepSeek V4 Flash is an efficiency-optimized Mixture-of-Experts model from DeepSeek with 284B total parameters and 13B activated parameters, supporting a 1M-token context window. It is designed for fast inference and...
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | DeepSeek V4 Flash | On the standard 1M input plus 500K output workload, DeepSeek V4 Flash is estimated at $0.2 vs $20 for GPT Chat Latest, saving $19.8 (99% lower). |
| High-volume input processing | DeepSeek V4 Flash | Lower prompt-token price matters most when prompts or retrieved passages dominate the bill. |
| Long responses and chatbots | DeepSeek V4 Flash | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | DeepSeek V4 Flash | A larger context window leaves more room for retrieved passages and source files. |