← Models

Claude 3.5 Sonnet vs Claude Opus 4.8

Compare Claude 3.5 Sonnet from Anthropic and Claude Opus 4.8 from Anthropic on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.

AnthropicClaude 3.5 SonnetAnthropicClaude Opus 4.8
+ Add model · 2/4
Anthropic logo
Claude 3.5 Sonnet
Anthropic · text, image → text

Claude 3.5 Sonnet delivers performance superior to Opus and speeds faster than its predecessor, all at the same price point. Its core strengths include: Coding: Autonomously writes, edits, and executes code with advanced reasoning and troubleshooting. Data Science: Augments human expertise by analyzing unstructured data and using multiple tools to generate insights. Visual Processing: Excels at interpreting charts, graphs, and images, accurately transcribing text to derive high-level insights. Agentic Tasks: Exceptional tool use makes it highly effective for complex, multi-step agentic workflows that interact with other systems.

Input$3.3 /M
Output$16.5 /M
Details
Anthropic logo
Claude Opus 4.8
Anthropic · text, image, pdf → text

Claude Opus 4.8 is Anthropic’s newest and most powerful publicly available model. It is suitable for the most complex tasks. It is Anthropic’s strongest model for complex reasoning, long-horizon agent programming, and highly autonomous work.claude-opus-4-8 does not display thought content by default; you need to set the additional parameter "display": "summarized" to enable it

Input$5 /M
Output$25 /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 3.5 Sonnet
Claude Opus 4.8
Input /M
$3.3
$5
Output /M
$16.5
$25
Cache read /M
-
$0.5
Context length
200,000
1,000,000
Max output
8,192
128,000
Time to First Token
0.6 s
1.1 s
Throughput
57.2 tok/s
82.6 tok/s
Modalities
textimage
textimagepdf
Supported Parameters
toolsfunction callingstructured outputs
thinkingtoolsfunction callingstructured outputs
API Formats
chat_completions · claude_api
Released
-
May 28, 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-3-5-sonnetclaude-opus-4-8

Tokens / day

-

Requests / day

-

Performance Past 3 Days

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

claude-3-5-sonnetclaude-opus-4-8

Throughput (tok/s)

-

TTFT (s)

-

Uptime (%)

-

LMArena Benchmarks

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

Text
claude-3-5-sonnetclaude-opus-4-8
13201380144015001560
Overall
13721473
Coding
14341527
Math
13501474
Hard prompts
13981503
Instruction following
13721477
Multi-turn
13881495
Creative writing
13691465
Longer query
13931499
Chinese
13651523
English
13821480
Vision
claude-3-5-sonnetclaude-opus-4-8
1140120012601320
Overall
11601279
OCR
11751294
Diagram
11811309
Homework
11671320

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.

Claude 3.5 Sonnet
$446 /mo
Claude Opus 4.8
$675 /mo

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

FAQ

Which is cheaper: Claude 3.5 Sonnet, Claude Opus 4.8?

Claude 3.5 Sonnet: $16.5/M output tokens; Claude Opus 4.8: $25/M. Use the cost calculator above to estimate your own workload.

How do their coding arena scores compare?

Claude Opus 4.8: 1527; Claude 3.5 Sonnet: 1434 (LMArena coding leaderboard).

Which responds faster?

Claude 3.5 Sonnet: 0.6s 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 3.5 Sonnet accepts 200,000 and Claude Opus 4.8 accepts 1,000,000 input tokens. Maximum output per request is 8,192 tokens on Claude 3.5 Sonnet and 128,000 tokens on Claude Opus 4.8.

Which one generates tokens faster?

Claude Opus 4.8 at 82.6 tok/s and Claude 3.5 Sonnet at 57.2 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 3.5 Sonnet accepts text and image input and supports tool calling, function calling and structured outputs; Claude Opus 4.8 accepts text, image and PDF input and supports thinking, tool calling, function calling and structured outputs.

Can I call Claude 3.5 Sonnet and Claude Opus 4.8 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.

Popular comparisons

Related model match-ups readers also look at.

Kimi K3vsQwen3.8 Max PreviewClaude Opus 5vsGPT 5.6 LunaClaude Opus 5vsClaude Sonnet 5Gemini 3.1 Pro PreviewvsGPT 5.5GLM 5.2vsKimi K3Gemini 3.6 FlashvsQwen3.8 MaxDeepSeek V4 FlashvsGLM 5.2Claude Opus 5vsGrok 4.5

© 2023 - 2026 AIHubMix, LLC

Product

Developer

Connect

Terms & Policies