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.
| Imagen 4 google/imagen-4 | GPT Image 1.5 openai/gpt-image-1.5 | |
|---|---|---|
| Provider | OpenAI | |
| Family | Imagen | |
| Modality | image | image |
| Context window | — | — |
| Max output | — | — |
| Released | 2026-04-14 | 2026-04-14 |
| Input price | $0.040 /img | $5.00 /1M |
| Output price | — | $10.00 /1M |
| Cache read | — | — |
| Tools | — | — |
| Streaming | — | — |
| Vision | — | — |
| JSON mode | — | — |
| Reasoning | — | — |
| Prompt caching | — | — |
Google's latest image generation model producing high-quality, photorealistic images from text prompts with support for multiple aspect ratios.
OpenAI's image generation model that creates and edits images from text prompts, supporting multiple quality levels and output sizes.
from openai import OpenAI
client = OpenAI(
base_url="https://api.aigateway.sh/v1",
api_key="sk-aig-...",
)
# Try Imagen 4
client.chat.completions.create(
model="google/imagen-4",
messages=[{"role":"user","content":"hello"}],
)
# Try GPT Image 1.5 — same client, same key
client.chat.completions.create(
model="openai/gpt-image-1.5",
messages=[{"role":"user","content":"hello"}],
)