Compare Claude Opus 4.8 (Anthropic) and Gemini 3.1 Pro (Preview) (Google) on price and context — both behind one OpenAI-compatible API on Zylo, billed at base per-token rates.
Last updated June 5, 2026
Per 1M tokens, base rates from your credit balance — no usage markup. Prices load live from our catalogue.
| Model | Provider | Context | Input / 1M | Output / 1M |
|---|---|---|---|---|
| Claude Opus 4.8 | Anthropic | 1M | $5.00 | $25.00 |
| Gemini 3.1 Pro (Preview) | 1M | $2.00 | $12.00 |
Best for the hardest reasoning, agentic and coding tasks. Context up to 1M tokens. Claude Opus 4.8 details →
Best for fast, low-cost inference at scale. Context up to 1M tokens. Gemini 3.1 Pro (Preview) details →
Because Zylo is OpenAI-compatible, comparing them is a one-string change.
for model in ["claude-opus-4.8", "gemini-3.1-pro-preview"]:
r = client.chat.completions.create(
model=model,
messages=[{"role": "user", "content": "Summarize this in one line."}],
)
print(model, "->", r.choices[0].message.content)On Zylo, Claude Opus 4.8 is $5.00/1M input and $25.00/1M output; Gemini 3.1 Pro (Preview) is $2.00/1M input and $12.00/1M output. Both are base rates with no usage markup.
Yes. Both are on Zylo's OpenAI-compatible API, so you switch by changing the model id between claude-opus-4.8 and gemini-3.1-pro-preview.
Free API key, OpenAI-compatible, local payments.
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