GPT-5.6 Terra Pro vs Sonar Deep Research
| Signal | GPT-5.6 Terra Pro | Delta | Sonar Deep Research |
|---|---|---|---|
Capabilities | 100 | +50 | |
Benchmarks | 88 | +88 | |
Pricing | 94 | +2 | |
Context window size | 96 | +15 | |
Recency | 100 | +62 | |
Output Capacity | 85 | +65 | |
| Overall Result | 6 wins | of 6 | 0 wins |
Score History
89
current score
GPT-5.6 Terra Pro
right now
40
current score
GPT-5.6 Terra Pro
OpenAI
Sonar Deep Research
Perplexity
GPT-5.6 Terra Pro saves you $200.00/month
That's $2400.00/year compared to Sonar Deep Research at your current usage level of 100K calls/month.
| Metric | GPT-5.6 Terra Pro | Sonar Deep Research | Winner |
|---|---|---|---|
| Overall Score | 89 | 40 | GPT-5.6 Terra Pro |
| Rank | #36 | #345 | GPT-5.6 Terra Pro |
| Quality Rank | #36 | #345 | GPT-5.6 Terra Pro |
| Adoption Rank | #36 | #345 | GPT-5.6 Terra Pro |
| Parameters | -- | -- | -- |
| Context Window | 1050K | 128K | GPT-5.6 Terra Pro |
| Pricing | $1.00/$6.00/M | $2.00/$8.00/M | -- |
| Signal Scores | |||
| Capabilities | 100 | 50 | GPT-5.6 Terra Pro |
| Benchmarks | 88 | -- | GPT-5.6 Terra Pro |
| Pricing | 94 | 92 | GPT-5.6 Terra Pro |
| Context window size | 96 | 81 | GPT-5.6 Terra Pro |
| Recency | 100 | 38 | GPT-5.6 Terra Pro |
| Output Capacity | 85 | 20 | GPT-5.6 Terra Pro |
Our score (0-100) is driven by benchmark performance (90%) from Arena Elo ratings, MMLU, GPQA, HumanEval, SWE-bench, and 15+ standardized evaluations. Capabilities and context window serve as tiebreakers (10%). Learn more about our methodology.
Scores 89/100 (rank #36), placing it in the top 88% of all 290 models tracked.
Scores 40/100 (rank #345), placing it in the top -19% of all 290 models tracked.
GPT-5.6 Terra Pro has a 49-point advantage, which typically translates to noticeably stronger performance on complex reasoning, code generation, and multi-step tasks.
Choose GPT-5.6 Terra Pro when you need:
- Processing long documents or large codebases (1050K token context)
- Multimodal workflows that require image understanding
- Agentic applications using tool/function calling
- Step-by-step reasoning and chain-of-thought problem solving
Choose Sonar Deep Research when you need:
- Step-by-step reasoning and chain-of-thought problem solving
GPT-5.6 Terra Pro offers 30% better value per quality point. At 1M tokens/day, you'd spend $105.00/month with GPT-5.6 Terra Pro vs $150.00/month with Sonar Deep Research - a $45.00 monthly difference.
Both models have comparable response speeds. For most applications, the latency difference is negligible.
When latency matters most: Interactive chatbots, IDE code completion, real-time translation, and user-facing applications where response time directly impacts experience. For batch processing, background summarization, or offline analysis, latency is less critical.
Code generation & review
Based on overall model capabilities and architecture for coding tasks like generating functions, debugging, and refactoring
Customer support chatbot
Suitable for user-facing chat with competitive response times. GPT-5.6 Terra Pro also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (1050K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($6.00/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (89/100) correlates with better nuance, coherence, and style in long-form content
Image understanding & OCR
Supports vision input - can analyze screenshots, diagrams, photos, and scanned documents directly
GPT-5.6 Terra Pro clearly outperforms Sonar Deep Research with a significant 49-point lead. For most general use cases, GPT-5.6 Terra Pro is the stronger choice. However, Sonar Deep Research may still excel in niche scenarios.
By Use Case
Best for Quality
GPT-5.6 Terra Pro
Marginally better benchmark scores; both are excellent
Best for Cost
GPT-5.6 Terra Pro
30% lower pricing; better value at scale
Best for Reliability
GPT-5.6 Terra Pro
Higher uptime and faster response speeds
Best for Prototyping
GPT-5.6 Terra Pro
Stronger community support and better developer experience
Best for Production
GPT-5.6 Terra Pro
Wider enterprise adoption and proven at scale
by OpenAI
- Choose for Quality - Marginally better benchmark scores; both are excellent
- Choose for Cost - 30% lower pricing; better value at scale
- Choose for Reliability - Higher uptime and faster response speeds
- Choose for Prototyping - Stronger community support and better developer experience
- Choose for Production - Wider enterprise adoption and proven at scale
| Capability | GPT-5.6 Terra Pro | Sonar Deep Research |
|---|---|---|
| Vision (Image Input)differs | ||
| Function Callingdiffers | ||
| Streaming | ||
| JSON Modediffers | ||
| Reasoning | ||
| Web Search | ||
| Image Output |
GPT-5.6 Terra Pro
OpenAI
Sonar Deep Research
Perplexity
GPT-5.6 Terra Pro saves you $4.20/month
That's 32% cheaper than Sonar Deep Research at 1,000 tokens/request and 100 requests/day.
Assumes 60% input / 40% output token ratio per request. Actual costs may vary based on your usage pattern.
| Parameter | GPT-5.6 Terra Pro | Sonar Deep Research |
|---|---|---|
| Context Window | 1.1M | 128K |
| Max Output Tokens | 128,000 | -- |
| Open Source | No | No |
| Created | Jul 9, 2026 | Mar 7, 2025 |