Claude Opus 4.8 vs Gemini 3.5 Flash
API pricing, context window and capabilities for Claude Opus 4.8 and Gemini 3.5 Flash, side by side. Prices are the cheapest serving route per 1M tokens, verified against LiteLLM and OpenRouter.
Verdict
computed from the published numbersClaude Opus 4.8 wins on coding and on intelligence. Gemini 3.5 Flash wins on price.
Price
Gemini 3.5 Flash
Coding
Claude Opus 4.8
Intelligence
Claude Opus 4.8
Context window
Tied
Key takeaways
who wins on what, from the published numbersClaude Opus 4.8 wins
- Higher max output (128K vs 66K)
- More serving providers (4 vs 3)
Gemini 3.5 Flash wins
- Cheaper input ($5.00 vs $1.50 /1M)
- Cheaper output ($25.00 vs $9.00 /1M)
- Supports audio
- Has web search
Cheaper overall
Gemini 3.5 Flash
$1.50 + $9.00 /1M
Larger context
Tied
More providers
Claude Opus 4.8
4 providers
Pricing & specs
cheapest serving route · per 1M tokens| Claude Opus 4.8 | Gemini 3.5 Flash | |
|---|---|---|
| Input $/1M | $5.00 | $1.50 best |
| Output $/1M | $25.00 | $9.00 best |
| Context window | 1M | 1M |
| Max output | 128K best | 66K |
| Serving providers | 4 best | 3 |
| Released | 2026-05-28 | 2026-05-22 |
Benchmarks
Artificial Analysis indices, side by side| Claude Opus 4.8 | Gemini 3.5 Flash | |
|---|---|---|
| Intelligence | 55.7 best | 50.2 |
| Coding | 74.3 best | 70.1 |
| GPQA Diamond | 92% | 92% |
| Output speed | 68 t/s | 188 t/s best |
| Latency (TTFT) | 38.57s | 18.79s best |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Claude Opus 4.8
via Amazon Bedrock
$50
Gemini 3.5 Flash
via Vertex AI
$17
Capabilities
feature support, side by side| Feature | Claude Opus 4.8 | Gemini 3.5 Flash |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | ✓ |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | — | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, Claude Opus 4.8 or Gemini 3.5 Flash?
Gemini 3.5 Flash is cheaper for input ($5.00 vs $1.50 per 1M tokens). Gemini 3.5 Flash is cheaper for output ($25.00 vs $9.00 per 1M tokens).
What is the context window difference between Claude Opus 4.8 and Gemini 3.5 Flash?
Both Claude Opus 4.8 and Gemini 3.5 Flash have about a 1M-token context window.
How do Claude Opus 4.8 and Gemini 3.5 Flash compare on benchmarks?
On the tracked Artificial Analysis indices, Claude Opus 4.8 leads on coding, and Claude Opus 4.8 leads on intelligence.
Pricing verified against LiteLLM + OpenRouter + provider pages · refreshed daily
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