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.
| Grok 4.7 xai/grok-4.7 | Gemini 3.8 Flash TTS google/gemini-3.8-flash-tts | |
|---|---|---|
| Provider | xAI | |
| Family | Grok 4 | Gemini 3 |
| Modality | text | audio-tts |
| Context window | 500,000 tok | — |
| Max output | 32,768 tok | — |
| Released | 2026-09-22 | 2026-10-06 |
| Input price | $2.00 /1M | $0.015 /1K ch |
| Output price | $6.00 /1M | — |
| Cache read | — | — |
| Tools | — | yes |
| Streaming | yes | — |
| Vision | yes | yes |
| JSON mode | — | yes |
| Reasoning | — | — |
| Prompt caching | — | — |
xAI's Grok 4.7, a frontier reasoning model for coding, agentic tasks, and knowledge work. Accepts text and image inputs, and supports function calling, structured outputs, and configurable reasoning effort (low, medium, high, xhigh).
Gemini 3.8 Flash TTS is Google's flagship text-to-speech model for expressive, natural speech generation.
# 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 Grok 4.7
client.chat.completions.create(
model="xai/grok-4.7",
messages=[{"role":"user","content":"hello"}],
)
# Try Gemini 3.8 Flash TTS — same client, same key
client.chat.completions.create(
model="google/gemini-3.8-flash-tts",
messages=[{"role":"user","content":"hello"}],
)