DeepSeek-V4-Flash-Vision-Exp vs GPT-5.6 Terra
GPT-5.6 Terra shows notably better performance in the majority of benchmarks. DeepSeek-V4-Flash-Vision-Exp is 13.6x cheaper per token.
DeepSeek · OpenAI · Updated for 2026
Which is better?
DeepSeek-V4-Flash-Vision-Exp outperforms in 1 benchmarks (AutomationBench), while GPT-5.6 Terra is better at 3 benchmarks (Agents' Last Exam, DeepSWE, Terminal-Bench 2.1). GPT-5.6 Terra shows notably better performance in the majority of benchmarks.
On price, DeepSeek-V4-Flash-Vision-Exp is roughly 13.6x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-5.6 Terra also accepts a larger context window (1,050,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current benchmark, pricing, and model metadata for 2026.
Choose DeepSeek-V4-Flash-Vision-Exp
- cost matters — it's about 13.6x cheaper per token
- you want the most recent training data — it shipped Aug 2026
Choose GPT-5.6 Terra
- you want the strongest raw capability — it leads on 3 of 4 shared benchmarks
- you process long inputs — it offers a 1,050,000 token context window
At a glance
The differences that matter most.
Performance Benchmarks
Comparative analysis across standard metrics
DeepSeek-V4-Flash-Vision-Exp outperforms in 1 benchmarks (AutomationBench), while GPT-5.6 Terra is better at 3 benchmarks (Agents' Last Exam, DeepSWE, Terminal-Bench 2.1).
GPT-5.6 Terra shows notably better performance in the majority of benchmarks.
Arena Performance
Playground indexes and blind preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, DeepSeek-V4-Flash-Vision-Exp ($0.22/1M tokens) is 9.1x cheaper than GPT-5.6 Terra ($2.00/1M tokens).
For output processing, DeepSeek-V4-Flash-Vision-Exp ($0.66/1M tokens) is 18.2x cheaper than GPT-5.6 Terra ($12.00/1M tokens).
In conclusion, GPT-5.6 Terra is more expensive than DeepSeek-V4-Flash-Vision-Exp.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5.6 Terra accepts 1,050,000 input tokens compared to DeepSeek-V4-Flash-Vision-Exp's 1,048,576 tokens. DeepSeek-V4-Flash-Vision-Exp can generate longer responses up to 393,216 tokens, while GPT-5.6 Terra is limited to 128,000 tokens.
Input Capabilities
Supported data types and modalities
Both DeepSeek-V4-Flash-Vision-Exp and GPT-5.6 Terra support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
DeepSeek-V4-Flash-Vision-Exp
GPT-5.6 Terra
Release Timeline
When each model was launched
DeepSeek-V4-Flash-Vision-Exp was released on 2026-08-21, while GPT-5.6 Terra was released on 2026-07-09.
DeepSeek-V4-Flash-Vision-Exp is 1 month newer than GPT-5.6 Terra.
Aug 21, 2026
6 days ago
1mo newerJul 9, 2026
1 months ago
Knowledge Cutoff
When training data ends
GPT-5.6 Terra has a documented knowledge cutoff of 2026-02-16, while DeepSeek-V4-Flash-Vision-Exp's cutoff date is not specified.
We can confirm GPT-5.6 Terra's training data extends to 2026-02-16, but cannot make a direct comparison without DeepSeek-V4-Flash-Vision-Exp's cutoff date.
—
Feb 2026
Provider Availability
DeepSeek-V4-Flash-Vision-Exp is available from DeepSeek. GPT-5.6 Terra is available from OpenAI.
DeepSeek-V4-Flash-Vision-Exp
GPT-5.6 Terra
Outputs Comparison
Judge for yourself.
Run your own prompts against DeepSeek-V4-Flash-Vision-Exp and GPT-5.6 Terra side-by-side, then vote on the output you prefer.
FAQ
Common questions about DeepSeek-V4-Flash-Vision-Exp vs GPT-5.6 Terra.