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-5.5 openai/gpt-5.5 | Claude Opus 4.7 anthropic/claude-opus-4.7 | |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Family | GPT-5 | Claude 4 |
| Modality | text | text |
| Context window | 1,000,000 tok | 1,000,000 tok |
| Max output | 16,384 tok | 128,000 tok |
| Released | 2026-04-24 | 2026-04-16 |
| Input price | $5.00 /1M | $5.00 /1M |
| Output price | $30.00 /1M | $25.00 /1M |
| Cache read | — | $0.500 /1M |
| Tools | yes | yes |
| Streaming | yes | yes |
| Vision | — | yes |
| JSON mode | yes | yes |
| Reasoning | yes | yes |
| Prompt caching | — | yes |
GPT-5.5 is OpenAI's flagship model with strong coding, reasoning, and multimodal capabilities.
Claude Opus 4.7 is Anthropic's most capable generally available model to date. It is highly autonomous and performs exceptionally well on long-horizon agentic work, knowledge work, vision tasks, and memory tasks.
# 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-5.5
client.chat.completions.create(
model="openai/gpt-5.5",
messages=[{"role":"user","content":"hello"}],
)
# Try Claude Opus 4.7 — same client, same key
client.chat.completions.create(
model="anthropic/claude-opus-4.7",
messages=[{"role":"user","content":"hello"}],
)