Claude Opus 4.8 vs Gemini 3.6 Flash — Price, Context, and Capability Compared
Verdict
Claude Opus 4.8 costs 3.0× more per blended million tokens than Gemini 3.6 Flash. Gemini 3.6 Flash has the larger context window (1,000,000 tokens). Default to Gemini 3.6 Flash unless you specifically need Claude Opus 4.8's edge.
Spec comparison
| Claude Opus 4.8 | Gemini 3.6 Flash | |
|---|---|---|
| Price (input) | $5.00/M | $1.50/M ✓ |
| Price (output) | $25.00/M | $9.00/M ✓ |
| Blended price | $10.00/M | $3.38/M ✓ |
| Context window | 500,000 tokens | 1,000,000 tokens ✓ |
| Max output | 64,000 tokens | 64,000 tokens |
| Modalities | text, vision | text, vision, audio |
| Reasoning mode | Yes | Yes |
| Released | 2026-04 | 2026-06 |
| Speed | 58 t/s | 114 t/s ✓ |
Cost at scale (3:1 blended)
| Tokens / month | Claude Opus 4.8 | Gemini 3.6 Flash | Delta |
|---|---|---|---|
| 1,000,000 | $10.00 | $3.38 | $6.63 (3.0×) |
| 10,000,000 | $100.00 | $33.75 | $66.25 (3.0×) |
| 100,000,000 | $1000.00 | $337.50 | $662.50 (3.0×) |
Choose Claude Opus 4.8 if…
- ✓Elite coding and multi-step reasoning
- ✓Strong instruction following on ambiguous prompts
- ✓Extended-thinking mode
- ✓Complex, multi-step tasks where Fable 5’s premium isn’t justified.
Choose Gemini 3.6 Flash if…
- ✓Faster than Gemini 3.5 Flash
- ✓Top-tier coding and agentic performance for its price
- ✓1M-token context
- ✓Latency-sensitive coding and agentic tasks that still need a huge context window.
Run this exact matchup right now
Send the same prompt to Claude Opus 4.8 and Gemini 3.6 Flash side by side and see the outputs yourself.
Try Claude Opus 4.8 vs Gemini 3.6 Flash FreeFAQ
Is Claude Opus 4.8 cheaper than Gemini 3.6 Flash?
Gemini 3.6 Flash is cheaper, at $3.38 per million blended tokens vs $10.00 for Claude Opus 4.8.
Which has the bigger context window, Claude Opus 4.8 or Gemini 3.6 Flash?
Gemini 3.6 Flash has the larger context window: 1,000,000 tokens vs 500,000.
Can Claude Opus 4.8 replace Gemini 3.6 Flash for coding?
Both are viable for coding. Elite coding and multi-step reasoning (Claude Opus 4.8) vs Faster than Gemini 3.5 Flash (Gemini 3.6 Flash) — pick based on which strength matters more for your workload.
Which is faster, Claude Opus 4.8 or Gemini 3.6 Flash?
Gemini 3.6 Flash is faster: 114 t/s vs 58 t/s, measured on our speed benchmarks.
Related
Pricing verified 2026-06-07. Specs verified 2026-08-08.
