Pricing, context window, capabilities, and release date — pulled from each provider's public docs. Both are available via the same AIgateway OpenAI-compatible endpoint; flip the model string to switch.
Both models stream in parallel through your own AIgateway key. Tokens, latency, and cost update as they arrive.
| DeepSeek V4 Pro deepseek/deepseek-v4-pro | GPT-5.6 Sol openai/gpt-5.6-sol | |
|---|---|---|
| Provider | Deepseek | OpenAI |
| Family | DeepSeek | GPT-5 |
| Modality | text | text |
| Context window | 131,072 tok | 1,050,000 tok |
| Max output | 32,768 tok | 128,000 tok |
| Released | 2026-08-03 | 2026-07-10 |
| Input price | $2.40 /1M | $5.00 /1M |
| Output price | $4.80 /1M | $30.00 /1M |
| Cache read | — | — |
| Tools | yes | yes |
| Streaming | yes | yes |
| Vision | — | yes |
| JSON mode | yes | yes |
| Reasoning | yes | yes |
| Prompt caching | — | — |
DeepSeek V4 Pro is a high-capability reasoning model from DeepSeek, served via Fireworks infrastructure for production-grade inference.
GPT-5.6 Sol is OpenAI's frontier GPT-5.6 model for complex professional work, using the Responses API for reasoning and stateful context management.
# pip install aigateway-py openai
# aigateway-py: sub-accounts, evals, replays, jobs, webhook verify.
# openai SDK: chat/embeddings/images/audio — drop-in compat per our SDK's own guidance.
from openai import OpenAI
client = OpenAI(
base_url="https://api.aigateway.sh/v1",
api_key="sk-aig-...",
)
# Try DeepSeek V4 Pro
client.chat.completions.create(
model="deepseek/deepseek-v4-pro",
messages=[{"role":"user","content":"hello"}],
)
# Try GPT-5.6 Sol — same client, same key
client.chat.completions.create(
model="openai/gpt-5.6-sol",
messages=[{"role":"user","content":"hello"}],
)