DeepSeek V4 Pro 0423 vs GPT-5.6 Sol
API pricing, context window and capabilities for DeepSeek V4 Pro 0423 and GPT-5.6 Sol, side by side. Prices are the cheapest listed serving route per 1M tokens, from LiteLLM and OpenRouter.
Verdict
computed from the published numbersDeepSeek V4 Pro 0423 wins on price. GPT-5.6 Sol wins on Terminal-Bench, on intelligence and on context window.
Price
DeepSeek V4 Pro 0423
Terminal-Bench
GPT-5.6 Sol
Intelligence
GPT-5.6 Sol
Context window
GPT-5.6 Sol
Key takeaways
who wins on what, from the published numbersDeepSeek V4 Pro 0423 wins
- Cheaper input ($0.435 vs $2.00 /1M)
- Cheaper output ($0.87 vs $10.00 /1M)
- Higher max output (1M vs 128K)
- More serving providers (16 vs 6)
GPT-5.6 Sol wins
- Larger context window (1M vs 1.1M)
- Supports vision
- Has web search
Cheaper overall
DeepSeek V4 Pro 0423
$0.435 + $0.87 /1M
Larger context
GPT-5.6 Sol
1.1M
More providers
DeepSeek V4 Pro 0423
16 providers
Pricing & specs
cheapest listed route · per 1M tokensOn-demand listed rates, OpenRouter routed quotes and Vercel reseller quotes. Enterprise commitments can be materially lower. An OpenRouter routed quote is the price of whichever upstream provider OpenRouter prefers today, so it moves day to day.
| DeepSeek V4 Pro 0423 | GPT-5.6 Sol | |
|---|---|---|
| Input $/1M | $0.435via Tencent best | $2.00OpenRouter routed quote |
| Output $/1M | $0.87via Tencent best | $10.00OpenRouter routed quote |
| Context window | 1M | 1.1M best |
| Max output | 1M best | 128K |
| Serving providers | 16 best | 6 |
| Date | Released Apr 24, 2026 | Released Jul 9, 2026 |
Benchmarks
Benchmark scores, side by side| DeepSeek V4 Pro 0423 | GPT-5.6 Sol | |
|---|---|---|
| Intelligence | 30.4 | 47.0 best |
| Terminal-Bench | 65% | 90% best |
| GPQA Diamond | 89% | 94% best |
| Output speed | 100 t/s best | 94 t/s |
| Latency (TTFT) | 1.64s best | 138.40s |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
DeepSeek V4 Pro 0423
via Tencent
$3.04
GPT-5.6 Sol
via OpenRouter
$20
Capabilities
feature support, side by side| Feature | DeepSeek V4 Pro 0423 | GPT-5.6 Sol |
|---|---|---|
| Vision | — | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | — | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, DeepSeek V4 Pro 0423 or GPT-5.6 Sol?
DeepSeek V4 Pro 0423 is cheaper for input ($0.435 vs $2.00 per 1M tokens) from Tencent. DeepSeek V4 Pro 0423 is cheaper for output ($0.87 vs $10.00 per 1M tokens) from Tencent.
What is the context window difference between DeepSeek V4 Pro 0423 and GPT-5.6 Sol?
DeepSeek V4 Pro 0423 has a 1M-token context window and GPT-5.6 Sol has 1.1M tokens, so GPT-5.6 Sol can take a larger prompt.
How do DeepSeek V4 Pro 0423 and GPT-5.6 Sol compare on benchmarks?
On the tracked benchmarks, GPT-5.6 Sol leads on Terminal-Bench, and GPT-5.6 Sol leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026
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