AI Models · Paid vs Paid

Claude Opus 4.8 Paid vs Gemini 3.5 Flash Paid

Claude Opus 4.8 vs Gemini 3.5 Flash compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.

Claude Opus 4.8 — full profile ›  ·  Gemini 3.5 Flash — full profile ›

Prices & specs refreshed from live data · OpenSourceAI.tech

Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.

Choose Gemini 3.5 Flash for the lower output price ($9/M vs $25/M). It also gives you the larger 1M context window.

Claude Opus 4.8 vs Gemini 3.5 Flash specs

SpecClaude Opus 4.8Gemini 3.5 Flash
MakerAnthropicGoogle
TypeProprietaryProprietary
Context window1M tokens1M tokens
Input price$5/M$1.5/M
Output price$25/M$9/M
Vision / multimodalYesYes
Tool / function callingYesYes
Self-hostableNo (API only)No (API only)
LicenseProprietaryProprietary

Feature comparison

CapabilityClaude Opus 4.8Gemini 3.5 Flash
Open weights (downloadable)✗✗
Self-hostable✗✗
Runs fully offline✗✗
Vision / multimodal✓✓
Tool / function calling✓✓
1M+ context window✓✓

Benchmarks: Claude Opus 4.8 vs Gemini 3.5 Flash

Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).

Gemini 3.5 Flash delivers 2.7× more intelligence per dollar.
Claude Opus 4.8
Gemini 3.5 Flash
Intelligence index
55.7
50.2
Coding index
74.3
70.1
GPQA
92%
92.2%
Humanity's Last Exam
45.7%
41%
Long Context Reasoning
67.7%
69.3%
SciCode
53.5%
53.1%
IFBench
62.2%
76.3%
τ²-Bench
94.4%
95.3%
τ-Bench Banking
27.6%
25.4%
Terminal-Bench
84.6%
78.7%
Terminal-Bench Hard
58.3%
40.9%
Speed
62.5 tok/s
293.7 tok/s
Latency
28.57s
12.74s
Intelligence per $
5.6
14.9

Benchmark data by Artificial Analysis.

How Claude Opus 4.8 and Gemini 3.5 Flash score

🤝 Neck and neck on these criteria (3.1 vs 3.2 / 5).
CriterionClaude Opus 4.8Gemini 3.5 Flash
Cost-efficiency3.03.5
Context window5.05.0
Openness1.51.5
Self-hosting1.01.0
Multimodality5.05.0

Scores come from live data — output price (cost), context length, open vs closed weights (openness & self-hosting) and vision/tool support (multimodality). Raw task quality isn't scored here; it depends on your benchmark — see the verdict.

What each model is

Claude Opus 4.8 Paid

Anthropic · Proprietary

Claude Opus 4.8 is Anthropic's most capable generally available model in the Opus family. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token...

Gemini 3.5 Flash Paid

Google · Proprietary

Gemini 3.5 Flash is Google's high-efficiency multimodal model, bringing near-Pro level coding and reasoning at Flash-tier cost and speed. It is highly optimized for coding proficiency and parallel agentic execution...

Other models in these families

These variants are tracked but not compared here — one page per family keeps the comparison readable.

Other variants tracked
Claude Opus 4.7Claude Opus 4.6
Other variants tracked
Gemini 3 Flash PreviewGemini 2.5 Flash

Frequently asked questions

Claude Opus 4.8 vs Gemini 3.5 Flash — which is cheaper?

Gemini 3.5 Flash is cheaper on output ($9/M vs $25/M).

Which has the larger context window?

Gemini 3.5 Flash offers the larger context window (1M tokens).

Claude Opus 4.8 vs Gemini 3.5 Flash — which should I pick in 2026?

Choose Gemini 3.5 Flash for the lower output price ($9/M vs $25/M). It also gives you the larger 1M context window.

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