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Claude Opus 5.5 vs DeepSeek V3 (0324)

At a glance

Anthropic's new flagship for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5.

1M ctx$4.00/$20.00 per M

March 2024 iteration of the DeepSeek V3 685B MoE model.

70128K ctx$0.29/$1.14 per M#57/92
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
Reasoning
CodingInsufficient data
AgenticInsufficient data
Sources:Epoch AI·OpenRouter· as of 2026-10-02
Capability
Capability—
Reasoning & Knowledge
Graduate Science34%90.6%Factual Recall72.2%
Math
Math Problems—Competition Math165%100.0%
Coding
Code Editing—
Agentic
Novel Reasoning92.5%Task Horizon—
CodingInsufficient data
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-10-02
Cheaper94%
Capability
CapabilityECI70.0
Reasoning & Knowledge
Graduate Science67.6%Factual Recall—
Math
Math Problems75.5%Competition Math37.8%
Coding
Code Editing55.1%
Agentic
Novel Reasoning—Task Horizon23min
Specs
1M
Context
128K
Max output
Sep 2026
Released
128K
Context
64K
Max output
Mar 2025
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input$4.00/M tokens
Output$20.00/M tokens
Cache read$0.20/M tokens
Cache write$5.00/M tokens
Web search$0.01/search
Live pricing, shown before you run
Input93%$0.29/M tokens
Output94%$1.14/M tokens
Cache read45%$0.11/M tokens
Chat with Claude Opus 5.5Go to model
Chat with DeepSeek V3 (0324)Go to model
Frequently Asked Questions: Claude Opus 5.5 vs DeepSeek V3 (0324)▼

Which is better, Claude Opus 5.5 or DeepSeek V3 (0324)?

▼

Both Claude Opus 5.5 and DeepSeek V3 (0324) are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, Claude Opus 5.5 or DeepSeek V3 (0324)?

▼

DeepSeek V3 (0324) has a lower blended cost. Claude Opus 5.5: $4.00 input / $20.00 output. DeepSeek V3 (0324): $0.29 input / $1.14 output.

Which has a larger context window, Claude Opus 5.5 or DeepSeek V3 (0324)?

▼

Claude Opus 5.5 has a larger context window: Claude Opus 5.5 supports 1M tokens vs DeepSeek V3 (0324) at 128K tokens.

Do both Claude Opus 5.5 and DeepSeek V3 (0324) support vision?

▼

Claude Opus 5.5 supports vision/image input, but DeepSeek V3 (0324) does not.

What are the key differences between Claude Opus 5.5 and DeepSeek V3 (0324)?

▼

Key differences: DeepSeek V3 (0324) is significantly cheaper; only Claude Opus 5.5 supports vision input; only Claude Opus 5.5 offers extended reasoning mode. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Claude Opus 5.5 and DeepSeek V3 (0324) for free on idapt.app to see which performs better for your specific needs.

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