$ diff claude-opus-5 gemini-3-5-flash
Claude Opus 5 vs Gemini 3.5 Flash
Anthropic and Google DeepMind, side by side. Every value below is the one recorded on the model’s own wiki page, with its citation — nothing is estimated.
AnthropicClaude Opus 5
- context
- 1M
- weights
- closed
- $/M in
- $5
- $/M out
- $25
- context
- 1.0M
- weights
- closed
- $/M in
- $1.5
- $/M out
- $9
What actually differs
- Context window
- Gemini 3.5 Flash takes 1.0M against 1M — modestly more room in a single request.
- Input price
- Gemini 3.5 Flash at $1.5/M against $5/M — 3.3× cheaper to feed.
- Output price
- Gemini 3.5 Flash at $9/M against $25/M — 2.8× cheaper to generate. Output dominates the bill on most agentic workloads, where the model writes far more than it reads.
- Recency
- Claude Opus 5 shipped 66 days after Gemini 3.5 Flash (2026-07-24 vs 2026-05-19).
Full spec
| Attribute | Claude Opus 5 | Gemini 3.5 Flash |
|---|---|---|
| Developer | Anthropic | Google DeepMind |
| Released | 2026-07-24 | 2026-05-19 |
| Context window | 1M tokens | 1,048,576 input / 65,536 output tokens |
| Pricing | $5/M input · $25/M output (standard); $10/M · $50/M (Fast mode, research preview) | $1.50 in / $9.00 out per 1M tokens ($0.15 cached) |
| License | proprietary | proprietary (API-only; no weight release) |
| Availability | Claude.ai, API (`claude-opus-5`), Bedrock (`anthropic.claude-opus-53`), Vertex AI, Microsoft Foundry, Claude Code, Cowork | Gemini API, Google AI Studio, Google Antigravity, Gemini app, AI Mode in Google Search |
Values come from Claude Opus 5 and Gemini 3.5 Flash, where each is cited to its source. This page states no benchmark result and ranks neither model — it puts two published specifications next to each other. Where a lab has not published a figure, the row says so rather than guessing. How these pages are produced.