Anthropic Claude
Claude Opus 5.5
$8.00 / 1M tokens
cheapest at Anthropic · $4.00 in · $20.00 out
Wins 1 of 4
Head to head · prices updated Oct 31, 2026
Claude Opus 5.5 vs Gemini 4 Argon
Claude Opus 5.5 costs 2.0× as much as Gemini 4 Argon at their cheapest providers (blended 3 input : 1 output tokens).
Google Gemini and Gemma
Gemini 4 Argon
$4.00 / 1M tokens
cheapest at Google Gemini API · $2.00 in · $10.00 out
Wins 3 of 4
- Lower priceGemini 4 Argon
- Higher accuracy (GPQA)Gemini 4 Argon
- Longer contextGemini 4 Argon
- More providersClaude Opus 5.5
Verdict
Gemini 4 Argon is the better deal on price
Claude Opus 5.5 costs 2.0× as much as Gemini 4 Argon at their cheapest providers (blended 3 input : 1 output tokens).
Gemini 4 Argon scores higher on GPQA Diamond: 96.4% (high reasoning) vs 90.6% (max reasoning).
Gemini 4 Argon wins on both price and accuracy here.
Gemini 4 Argon accepts longer prompts (1049K vs 1000K tokens).
Your monthly bill
What would each cost you?
Gemini 4 Argon saves you $40.00 a month ($480.00 a year) for this workload.
Side by side
| Claude Opus 5.5 | Gemini 4 Argon | |
|---|---|---|
| Cheapest blended price / 1M | $8.00 | $4.00 |
| Input / output per 1M | $4.00 / $20.00 | $2.00 / $10.00 |
| Accuracy (GPQA Diamond) | 90.6% (max reasoning) | 96.4% (high reasoning) |
| Max context | 1M | 1M |
| Providers we track | 4 | 2 |
Standard list prices at each model's cheapest provider we track; blended = 3 input : 1 output tokens. GPQA Diamond from Epoch AI (CC BY 4.0), best measured reasoning setting, named next to each score. Methodology.
Where to buy each one
Questions people ask
Is Claude Opus 5.5 cheaper than Gemini 4 Argon?
Claude Opus 5.5 costs 2.0× as much as Gemini 4 Argon at their cheapest providers (blended 3 input : 1 output tokens).
Which is more accurate, Claude Opus 5.5 or Gemini 4 Argon?
On GPQA Diamond (graduate-level science questions, measured by Epoch AI) Claude Opus 5.5 scores 90.6% (max reasoning) and Gemini 4 Argon 96.4% (high reasoning). One benchmark is not the whole picture; test both on your own prompts.
How much does Claude Opus 5.5 cost per 1M tokens?
From $4.00 input and $20.00 output per 1M tokens at Anthropic, the cheapest of 4 providers we track.
How much does Gemini 4 Argon cost per 1M tokens?
From $2.00 input and $10.00 output per 1M tokens at Google Gemini API, the cheapest of 2 providers we track.
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