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Claude Opus 4.5 vs Claude Opus 4.8

Compare Claude Opus 4.5 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 Opus 4.5AnthropicClaude Opus 4.8
+ Add model · 2/4
Anthropic logo
Claude Opus 4.5
Anthropic · text, image, pdf → text

Claude Opus 4.5 is Anthropic’s latest frontier reasoning model, optimized for complex engineering, agentic workflows, and long-horizon computer use. It features strong multimodal capabilities, improved resistance to prompt injection, and a new Verbosity parameter to control token efficiency. With advanced tool use, extended context, and multi-agent support, Opus 4.5 excels in autonomous research, debugging, planning, and spreadsheet/browser operations. ⚠️ The minimum cache token for claude-opus-4-5 has been increased from 1,024 to 4,096 tokens.

Input$5 /M
Output$25 /M
Cache read$0.5 /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 Opus 4.5
Claude Opus 4.8
Input /M
$5
$5
Output /M
$25
$25
Cache read /M
$0.5
$0.5
Context length
200,000
1,000,000
Max output
64,000
128,000
Time to First Token
1.9 s
1.1 s
Throughput
42.1 tok/s
82.6 tok/s
Modalities
textimagepdf
textimagepdf
Supported Parameters
thinkingtoolsfunction callingstructured outputs
thinkingtoolsfunction callingstructured outputs
API Formats
chat_completions · claude_api
Released
November 24, 2025
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-opus-4-5claude-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-opus-4-5claude-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-opus-4-5claude-opus-4-8
1440148015201560
Overall
14691473
Coding
15231527
Math
14661474
Hard prompts
14981503
Instruction following
14751477
Multi-turn
14841495
Creative writing
14611465
Longer query
14931499
Chinese
15011523
English
14791480
WebDev Arena
claude-opus-4-5claude-opus-4-8
14401480152015601600
Overall
14661540
React
14591541
HTML
14741527
Gaming
15731573
Simulations
15441544
Data analytics
15021502

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 Opus 4.5
$675 /mo
Claude Opus 4.8
$675 /mo

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

FAQ

Which is cheaper: Claude Opus 4.5, Claude Opus 4.8?

Claude Opus 4.5: $25/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 Opus 4.5: 1523 (LMArena coding leaderboard).

Which responds faster?

Claude Opus 4.8: 1.1s 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 4.5 accepts 200,000 and Claude Opus 4.8 accepts 1,000,000 input tokens. Maximum output per request is 64,000 tokens on Claude Opus 4.5 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 Opus 4.5 at 42.1 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 4.5 accepts text, image and PDF input and supports thinking, 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 Opus 4.5 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.

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