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 Opus 4.5 anthropic/claude-opus-4.5 | Claude Opus 4.6 anthropic/claude-opus-4.6 | |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Family | Claude 4 | Claude 4 |
| Modality | text | text |
| Context window | 200,000 tok | 1,000,000 tok |
| Max output | 32,000 tok | 128,000 tok |
| Released | 2026-05-22 | 2026-05-22 |
| Input price | $5.00 /1M | $5.00 /1M |
| Output price | $25.00 /1M | $25.00 /1M |
| Cache read | — | $0.500 /1M |
| Tools | yes | yes |
| Streaming | yes | yes |
| Vision | yes | yes |
| JSON mode | yes | yes |
| Reasoning | yes | yes |
| Prompt caching | — | yes |
Claude Opus 4.5 brings further reasoning, coding, and agentic improvements over Opus 4.1, with stronger tool use and tighter instruction following.
Claude Opus 4.6 is Anthropic's flagship language model built for complex, multi-step work in coding, financial analysis, and legal reasoning. It uses extended thinking to work through complex problems carefully and features a one million 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 Opus 4.5
client.chat.completions.create(
model="anthropic/claude-opus-4.5",
messages=[{"role":"user","content":"hello"}],
)
# Try Claude Opus 4.6 — same client, same key
client.chat.completions.create(
model="anthropic/claude-opus-4.6",
messages=[{"role":"user","content":"hello"}],
)