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.
| Claude Sonnet 4.6 anthropic/claude-sonnet-4.6 | Gemini 2.5 Pro google/gemini-2.5-pro | |
|---|---|---|
| Provider | Anthropic | |
| Family | Claude 4 | |
| Modality | text | text |
| Context window | 200,000 tok | 1,000,000 tok |
| Max output | 128,000 tok | 65,536 tok |
| Released | 2026-05-22 | 2026-05-22 |
| Input price | $3.00 /1M | $1.25 /1M |
| Output price | $15.00 /1M | $10.00 /1M |
| Cache read | $0.300 /1M | — |
| Tools | yes | — |
| Streaming | yes | yes |
| Vision | yes | — |
| JSON mode | yes | — |
| Reasoning | yes | — |
| Prompt caching | yes | — |
Claude Sonnet 4.6 is Anthropic's latest balanced model offering strong coding, reasoning, and agentic capabilities with improved instruction following.
Google's most capable Gemini 2.5 model with strong reasoning, thinking support, and a 1M token context window.
# 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 Claude Sonnet 4.6
client.chat.completions.create(
model="anthropic/claude-sonnet-4.6",
messages=[{"role":"user","content":"hello"}],
)
# Try Gemini 2.5 Pro — same client, same key
client.chat.completions.create(
model="google/gemini-2.5-pro",
messages=[{"role":"user","content":"hello"}],
)