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Claude Opus 5 vs Gemini 3.1 Pro Preview

Compare Claude Opus 5 from Anthropic and Gemini 3.1 Pro Preview from Google on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.

AnthropicClaude Opus 5GoogleGemini 3.1 Pro Preview
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Anthropic logo
Claude Opus 5
Anthropic · text, image, pdf → text

Claude Opus 5 is Anthropic’s flagship model for demanding reasoning, coding, and long-horizon agentic work. It is particularly strong at end-to-end software tasks, code review and bug finding, visual analysis of charts and documents, complex office deliverables, and coordinating parallel subagents. The model maintains strong instruction following and tool use across extended tasks, while remaining effective at lower effort settings for workloads that prioritize latency and token efficiency.

Input$5 /M
Output$25 /M
Cache read$0.5 /M
Details
Google logo
Gemini 3.1 Pro Preview
Google · text, image, video, audio, pdf → text

Gemini 3.1 Pro Preview is designed to further optimize the performance and reliability of the Gemini 3 Pro series, offering improved reasoning capabilities, greater token efficiency, and a more robust, factually consistent user experience. It is optimized for software-engineering behaviors and usability, and is also suitable for agent workflows that require precise tool invocation and reliable multi-step execution, enabling stable operation across a variety of real-world scenarios.

Input$2 /M
Output$12 /M
Cache read$0.5 /M
Details

Pricing & Specifications

Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.

Claude Opus 5
Gemini 3.1 Pro Preview
Input /M
$5
$2
Output /M
$25
$12
Cache read /M
$0.5
$0.5
Context length
1,000,000
1,048,576
Max output
128,000
65,536
Time to First Token
0.7 s
7.5 s
Throughput
84.3 tok/s
101.9 tok/s
Modalities
textimagepdf
textimagevideoaudiopdf
Supported Parameters
thinkingtoolsstructured outputslong contextweb
thinkingtoolsfunction callingstructured outputswebdeepsearchlong context
API Formats
chat_completions · claude_api · responses
chat_completions · gemini_api · claude_api
Released
July 24, 2026
February 19, 2026

Promotional prices show the discounted rate; see each model page for promotion windows.

Activity Past 30 Days

Daily traffic served through AIHubMix — how demand for each model is trending.

claude-opus-5gemini-3.1-pro-preview

Tokens / day

-

Requests / day

-

Performance Past 3 Days

Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.

claude-opus-5gemini-3.1-pro-preview

Throughput (tok/s)

-

TTFT (s)

-

Uptime (%)

-

LMArena Benchmarks

LMArena ratings by capability (Bradley-Terry, commonly called Elo). Higher is better.

Text
claude-opus-5gemini-3.1-pro-preview
1440148015201560
Overall
14871492
Coding
15211534
Math
14881521
Hard prompts
15081516
Instruction following
14801496
Multi-turn
14871496
Creative writing
14721481
Longer query
14991503
Chinese
15281549
English
14901494
Vision
claude-opus-5gemini-3.1-pro-preview
126013001340
Overall
12801288
OCR
12941304
Diagram
13081329
Homework
13101323
WebDev Arena
claude-opus-5gemini-3.1-pro-preview
1380148015801680
Overall
14471658
React
14381678
HTML
14891649
Gaming
14681725
Simulations
14731723
Data analytics
14061579

Source: LMArena (arena.ai) leaderboard, imported by AIHubMix. Models without published ratings are omitted per chart.

Cost calculator

Estimate your monthly bill for the same workload on each model.

Gemini 3.1 Pro Preview
$300 /mo
Claude Opus 5
$675 /mo

Monthly = daily × 30. Discounted rates applied where a promotion is active.

FAQ

Which is cheaper: Claude Opus 5, Gemini 3.1 Pro Preview?

Gemini 3.1 Pro Preview: $12/M output tokens; Claude Opus 5: $25/M. Use the cost calculator above to estimate your own workload.

How do their coding arena scores compare?

Claude Opus 5: 1534; Gemini 3.1 Pro Preview: 1521 (LMArena coding leaderboard).

Which responds faster?

Claude Opus 5: 0.7s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.

How large is each context window?

Claude Opus 5 accepts 1,000,000 and Gemini 3.1 Pro Preview accepts 1,048,576 input tokens. Maximum output per request is 128,000 tokens on Claude Opus 5 and 65,536 tokens on Gemini 3.1 Pro Preview.

Which one generates tokens faster?

Gemini 3.1 Pro Preview at 101.9 tok/s and Claude Opus 5 at 84.3 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.

What inputs and capabilities does each model support?

Claude Opus 5 accepts text, image and PDF input and supports thinking, tool calling, structured outputs, long context and web search; Gemini 3.1 Pro Preview accepts text, image, video, audio and PDF input and supports thinking, tool calling, function calling, structured outputs, web search, deep search and long context.

Can I call Claude Opus 5 and Gemini 3.1 Pro Preview with the same API key?

Yes. AIHubMix serves every model on this page behind one OpenAI-compatible endpoint, so switching between them is a one-line change to the model field — no second account, key or SDK.

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