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.
| GPT Image 1.5 openai/gpt-image-1.5 | Imagen 4 google/imagen-4 | |
|---|---|---|
| Provider | OpenAI | |
| Family | Imagen | |
| Modality | image | image |
| Context window | — | — |
| Max output | — | — |
| Released | 2026-04-14 | 2026-04-14 |
| Input price | $5.00 /1M | $0.040 /img |
| Output price | $10.00 /1M | — |
| Cache read | — | — |
| Tools | — | — |
| Streaming | — | — |
| Vision | — | — |
| JSON mode | — | — |
| Reasoning | — | — |
| Prompt caching | — | — |
OpenAI's image generation model that creates and edits images from text prompts, supporting multiple quality levels and output sizes.
Google's latest image generation model producing high-quality, photorealistic images from text prompts with support for multiple aspect ratios.
# 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 GPT Image 1.5
client.chat.completions.create(
model="openai/gpt-image-1.5",
messages=[{"role":"user","content":"hello"}],
)
# Try Imagen 4 — same client, same key
client.chat.completions.create(
model="google/imagen-4",
messages=[{"role":"user","content":"hello"}],
)