AI Models · Paid vs Paid

Claude Opus 4.8 Paid vs Gemini 3.1 Pro Preview Paid

Claude Opus 4.8 vs Gemini 3.1 Pro Preview compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.

Claude Opus 4.8 — full profile ›  ·  Gemini 3.1 Pro Preview — 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 3.1 Pro Preview for the lower output price ($12/M vs $25/M). It also gives you the larger 1M context window.

Claude Opus 4.8 vs Gemini 3.1 Pro Preview specs

SpecClaude Opus 4.8Gemini 3.1 Pro Preview
MakerAnthropicGoogle
TypeProprietaryProprietary
Context window1M tokens1M tokens
Input price$5/M$2/M
Output price$25/M$12/M
Vision / multimodalYesYes
Tool / function callingYesYes
Self-hostableNo (API only)No (API only)
LicenseProprietaryProprietary

Feature comparison

CapabilityClaude Opus 4.8Gemini 3.1 Pro Preview
Open weights (downloadable)✗✗
Self-hostable✗✗
Runs fully offline✗✗
Vision / multimodal✓✓
Tool / function calling✓✓
1M+ context window✓✓

Benchmarks: Claude Opus 4.8 vs Gemini 3.1 Pro Preview

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

Claude Opus 4.8
Gemini 3.1 Pro Preview
Intelligence index
55.7
46.5
Coding index
74.3
68.8
GPQA
92%
94.1%
Humanity's Last Exam
45.7%
44.7%
Long Context Reasoning
67.7%
72.7%
SciCode
53.5%
58.9%
IFBench
62.2%
77.1%
τ²-Bench
94.4%
95.6%
τ-Bench Banking
27.6%
16.5%
Terminal-Bench
84.6%
73.8%
Terminal-Bench Hard
58.3%
53.8%
Speed
62.5 tok/s
137.1 tok/s
Latency
28.57s
23.58s
Intelligence per $
5.6
10.3

Benchmark data by Artificial Analysis.

How Claude Opus 4.8 and Gemini 3.1 Pro Preview score

🤝 Neck and neck on these criteria (3.1 vs 3.2 / 5).
CriterionClaude Opus 4.8Gemini 3.1 Pro Preview
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 3.1 Pro Preview Paid

Google · Proprietary

Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows. Building on the multimodal foundation.

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 2.5 Pro

Frequently asked questions

Claude Opus 4.8 vs Gemini 3.1 Pro Preview — which is cheaper?

Gemini 3.1 Pro Preview is cheaper on output ($12/M vs $25/M).

Which has the larger context window?

Gemini 3.1 Pro Preview offers the larger context window (1M tokens).

Claude Opus 4.8 vs Gemini 3.1 Pro Preview — which should I pick in 2026?

Choose Gemini 3.1 Pro Preview for the lower output price ($12/M vs $25/M). It also gives you the larger 1M context window.

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