Model Comparison
GPT-5.6 Terra vs Phi-4-multimodal-instructWhich is better in 2026?
GPT-5.6 Terra significantly outperforms across most benchmarks. Phi-4-multimodal-instruct is 90.0x cheaper per token.
Verdict: GPT-5.6 Terra vs Phi-4-multimodal-instruct — which is better?
GPT-5.6 Terra (by OpenAI) and Phi-4-multimodal-instruct (by Microsoft) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.
GPT-5.6 Terra outperforms in 1 benchmarks (MMMU-Pro), while Phi-4-multimodal-instruct is better at 0 benchmarks. GPT-5.6 Terra significantly outperforms across most benchmarks.
On price, Phi-4-multimodal-instruct is roughly 90.0x 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.
Choose GPT-5.6 Terra if…
- you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
- you process long inputs — it offers a 1,050,000 token context window
- you want the most recent training data — it shipped Jul 2026
Choose Phi-4-multimodal-instruct if…
- cost matters — it's about 90.0x cheaper per token
- you need open weights you can self-host or fine-tune
Performance Benchmarks
Comparative analysis across standard metrics
GPT-5.6 Terra outperforms in 1 benchmarks (MMMU-Pro), while Phi-4-multimodal-instruct is better at 0 benchmarks.
GPT-5.6 Terra significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-5.6 Terra ($2.50/1M tokens) is 50.0x more expensive than Phi-4-multimodal-instruct ($0.05/1M tokens).
For output processing, GPT-5.6 Terra ($15.00/1M tokens) is 150.0x more expensive than Phi-4-multimodal-instruct ($0.10/1M tokens).
In conclusion, GPT-5.6 Terra is more expensive than Phi-4-multimodal-instruct.*
* 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 Phi-4-multimodal-instruct's 128,000 tokens. Both models can generate responses up to 128,000 tokens.
Input Capabilities
Supported data types and modalities
Both GPT-5.6 Terra and Phi-4-multimodal-instruct support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-5.6 Terra
Phi-4-multimodal-instruct
License
Usage and distribution terms
GPT-5.6 Terra is licensed under a proprietary license, while Phi-4-multimodal-instruct uses MIT.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
MIT
Open weights
Release Timeline
When each model was launched
GPT-5.6 Terra was released on 2026-07-09, while Phi-4-multimodal-instruct was released on 2025-02-01.
GPT-5.6 Terra is 17 months newer than Phi-4-multimodal-instruct.
Jul 9, 2026
1 weeks ago
1.4yr newerFeb 1, 2025
1.5 years ago
Knowledge Cutoff
When training data ends
GPT-5.6 Terra has a knowledge cutoff of 2026-02-16, while Phi-4-multimodal-instruct has a cutoff of 2024-06-01.
GPT-5.6 Terra has more recent training data (up to 2026-02-16), making it potentially better informed about events through that date compared to Phi-4-multimodal-instruct (2024-06-01).
Feb 2026
1.7 yr newerJun 2024
Provider Availability
GPT-5.6 Terra is available from OpenAI. Phi-4-multimodal-instruct is available from DeepInfra.
GPT-5.6 Terra
Phi-4-multimodal-instruct
Outputs Comparison
Key Takeaways
Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against GPT-5.6 Terra and Phi-4-multimodal-instruct side-by-side, then vote on the output you prefer.
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FAQ
Common questions about GPT-5.6 Terra vs Phi-4-multimodal-instruct.