$ diff claude-opus-5-5 gemini-3-8-flash
Claude Opus 5.5 vs Gemini 3.8 Flash
Values come from Claude Opus 5.5 and Gemini 3.8 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.
AnthropicClaude Opus 5.5
- context
- 1M
- weights
- closed
- $/M in
- $4
- $/M out
- $20
- context
- 1.0M
- weights
- closed
- $/M in
- $0.75
- $/M out
- $3.75
What actually differs
- Context window
- Gemini 3.8 Flash takes 1.0M against 1M — modestly more room in a single request.
- Input price
- Gemini 3.8 Flash at $0.75/M against $4/M — 5.3× cheaper to feed.
- Output price
- Gemini 3.8 Flash at $3.75/M against $20/M — 5.3× cheaper to generate. Output dominates the bill on most agentic workloads, where the model writes far more than it reads.
- Recency
- Claude Opus 5.5 shipped 20 days after Gemini 3.8 Flash (2026-09-22 vs 2026-09-02).
Full spec
| Attribute | Claude Opus 5.5 | Gemini 3.8 Flash |
|---|---|---|
| Developer | Anthropic | Google DeepMind |
| Released | 2026-09-22 | 2026-09-02 |
| Context window | 1M tokens | 1,048,576 tokens (65,536 max output) |
| Pricing | $4/M input · $20/M output · cache reads $0.20/M · cache writes $5/M | $0.75/M input · $3.75/M output (introductory, through 2026-12-31) · $1.50/M · $7.50/M from 2027-01-01 |
| License | proprietary (API-only; no weight release) | proprietary |
| Availability | Claude apps, Claude Code, Claude API as `claude-opus-5-5`, Amazon Bedrock, Google Cloud Vertex AI, Microsoft Foundry | Gemini API, Google AI Studio, Antigravity, Android Studio, Gemini Enterprise / Gemini Enterprise Agent Platform |