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Home/GPT-5.5 vs DeepSeek V3
Winner: GPT-5.5OpenAI vs DeepSeek

GPT-5.5 vs DeepSeek V3

GPT-5.5 wins on coding (96 vs 87) and writing quality and context window (1M vs 128K). DeepSeek V3 wins on price ($0.27 vs $5/1M input). For most workflows, GPT-5.5 is the stronger default — best openai flagship for agentic coding, research, and computer-use work.

Last verified Apr 26, 2026/Model data modified Apr 26, 2026
Rankings refresh dailyScored on 6 criteriaNo paid rankings
OpenAIPremium
Input cost
$5.00/1M
Context
1M tokens
Speed
Balanced

Clear recommendation block

The shortest way to see the safest default, the lower-cost option, and the specialist pick before you read deeper.

Best overall model

GPT-5.5

View
Why this recommendation

GPT-5.5 is the safest overall answer here when you want the strongest default instead of the lowest list price.

OpenAIPremium
Best for
Agentic coding, computer-use workflows, and complex research tasks
Price
$5.00/1M
Context
1M tokens
Best budget model

Grok 4

View
Why this recommendation

Grok 4 is the lower-cost option to start with when you still need useful output at scale.

xAIBalanced
Best for
Coding and research at competitive pricing with maximum context
Price
$2.00/1M
Context
2M tokens
Best for speed

DeepSeek V3

View
Why this recommendation

DeepSeek V3 is the better pick when response speed matters more than maximum reasoning depth.

DeepSeekBudget
Best for
Coding, reasoning, and general tasks at extreme cost efficiency
Price
$0.27/1M
Context
128k tokens

Why this page recommends it

GPT-5.5 leads on coding with a score of 96 vs 87 for DeepSeek V3.

GPT-5.5 has the larger context window: 1M vs 128K for DeepSeek V3.

DeepSeek V3 is cheaper at $0.27/1M input tokens vs $5/1M for GPT-5.5.

Decision notes

Choose GPT-5.5 for coding and research — agentic coding.

Choose DeepSeek V3 when coding.

DeepSeek V3 is the more cost-efficient option at $0.27/1M — worth considering if token volume is a concern.

Interactive decision lab

Test the recommendation against your priority

Switch the scoring lens to see whether the top answer changes when you care more about cost, speed, or long-document work.

#1GPT-5.587 pts
#2DeepSeek V374 pts
Quality first

GPT-5.5

OpenAI / Premium / Apr 26, 2026

87

Best OpenAI flagship for agentic coding, research, and computer-use work.

Ranks models by the broadest mix of coding, writing, research, and long-context usefulness.

Cost
$5.00/1M
$30.00/1M out
Speed
Balanced
3/100 score
Context
1M tokens
input window
View model
Data-backed recommendation
Avoid this pick if

You only care about the highest public coding benchmark score or need a cheaper high-volume model.

Recommended comparisons

The fastest way to see where the recommendation shifts when your priority changes.

OpenAIPremiumWinner: GPT-5.5

GPT-5.5

Best OpenAI flagship for agentic coding, research, and computer-use work.

Best use case
Agentic coding, computer-use workflows, and complex research tasks
Input
$5.00/1M
Pricing
Premium
Speed
Balanced
Context
1M tokens
AgenticCodingComputer use
DeepSeekBudgetOption 2

DeepSeek V3

GPT-4o-class coding quality at under $0.30/1M — the best value in the directory.

Best use case
Coding, reasoning, and general tasks at extreme cost efficiency
Input
$0.27/1M
Pricing
Budget
Speed
Fast
Context
128k tokens
Open sourceBudgetCoding

Pros

58.6% on SWE-Bench Pro, ahead of GPT-5.4 on the same public coding benchmark

82.7% on Terminal-Bench 2.0 for complex command-line workflows

1M token API context window for large-codebase and document-heavy workflows

Cons

Claude Opus 4.7 leads GPT-5.5 on SWE-Bench Pro for pure coding ceiling

Premium API pricing makes it less attractive for high-volume low-risk work

Explore related decisions

Browse all modelsCompare pricingView GPT-5.5View DeepSeek V3GPT 5 5Deepseek V3Best AI for codingBest AI for writingBest AI for researchCompare models side by side

How we evaluate AI models

UseRightAI recommendations are based on practical decision factors people actually feel in day-to-day use.

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FAQ

Is GPT-5.5 better than DeepSeek V3?

GPT-5.5 wins on more categories — coding, research, reasoning. DeepSeek V3 is the better pick when coding. The right choice depends on your specific use case.

Which is cheaper — GPT-5.5 or DeepSeek V3?

DeepSeek V3 is cheaper at $0.27/1M input and $1.1/1M output. GPT-5.5 costs $5/1M input and $30/1M output.

Which has a larger context window — GPT-5.5 or DeepSeek V3?

GPT-5.5 has the larger context window at 1M tokens vs DeepSeek V3's 128K. For large document analysis, GPT-5.5 is the stronger pick.

Is GPT-5.5 or DeepSeek V3 better for coding?

GPT-5.5 is better for coding with a score of 96 vs DeepSeek V3's 87. For the highest coding quality available, Claude Sonnet 4.6 (79.6% SWE-bench) or Opus 4.6 (80.8%) remain benchmarks.

Which is faster — GPT-5.5 or DeepSeek V3?

DeepSeek V3 is faster with a fast speed rating (score: 4) vs GPT-5.5's balanced rating (score: 3).