Is GPT-5.6 Terra cheaper than GPT-5.6 Sol?

Yes, GPT-5.6 Terra is 50% cheaper on input ($2.50 vs $5) and 50% cheaper on output ($15 vs $30) than GPT-5.6 Sol. Both have the same 1.05M context window.

What's the difference between GPT-5.6 Sol and GPT-5.6 Terra?

Same context window (1.05M), same provider (OpenAI), but Sol costs 2x more. Sol is positioned as the premium tier with potentially better reasoning and output quality. Terra offers 50% savings with similar capabilities for most tasks.

When should I choose GPT-5.6 Sol over Terra?

Choose Sol when you need the absolute best output quality for critical tasks (creative writing, complex reasoning, high-stakes decisions). For most workloads — chatbots, code generation, RAG, summarization — Terra offers 50% savings with comparable results.

Can I mix GPT-5.6 Sol and Terra to optimize costs?

Yes. Use Terra for 80% of routine requests (50% cheaper) and route only the most critical, quality-sensitive tasks to Sol. This tiered strategy can save 40%+ vs using Sol for everything.

Same Provider, Different Tiers

GPT-5.6 Sol vs GPT-5.6 Terra

Same context window, 50% price difference. Is the premium tier worth it?

Last verified: Jul 13, 2026 · See all 67 models ranked →

Feature	GPT-5.6 Sol	GPT-5.6 Terra
Input price (per 1M tokens)	$5.00	$2.50
Output price (per 1M tokens)	$30.00	$15.00
Context window	1.05M tokens	1.05M tokens
Standard request cost	$0.0195	$0.00975
Output-heavy request cost	$0.06	$0.03

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GPT-5.6 Sol

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OpenAI

GPT-5.6 Terra

estimated monthly cost

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Per request$0

The Verdict

GPT-5.6 Terra wins on price by 50%. Same context window.

GPT-5.6 Terra ($2.50/$15) is 50% cheaper on input and 50% cheaper on output than GPT-5.6 Sol ($5/$30). Both have the same 1.05M context window. For most workloads, Terra offers the same capabilities at half the price. Sol is the premium tier for tasks where output quality is critical.

When to Choose GPT-5.6 Terra

Cost-sensitive workloads: 50% cheaper across the board. For high-volume APIs, this is massive savings.
Output-heavy tasks: Chatbots, code generation, summarization — Terra's $15 output price beats Sol's $30 by 50%.
Same context needs: Both have 1.05M context. No compromise on document/codebase size.
Routine tasks: Classification, extraction, formatting — Terra handles these perfectly at half the cost.

When to Choose GPT-5.6 Sol

Premium output quality: For creative writing, complex reasoning, or high-stakes decisions where the best possible output matters more than cost.
Critical applications: Medical, legal, financial analysis — where accuracy and nuance justify the 2x price premium.
Customer-facing outputs: When the AI's response directly represents your brand and quality must be perfect.

Cost Comparison: Real-World Scenarios

Chatbot (1,000 requests/day, 1,500 input, 400 output)

GPT-5.6 Sol$585.00/mo

GPT-5.6 Terra$292.50/mo

Monthly savings$292.50/mo (50%)

Code Generation (200 requests/day, 3,000 input, 1,200 output)

GPT-5.6 Sol$3,600.00/mo

GPT-5.6 Terra$1,800.00/mo

Monthly savings$1,800.00/mo (50%)

RAG Pipeline (500 queries/day, 5,000 input, 800 output)

GPT-5.6 Sol$1,950.00/mo

GPT-5.6 Terra$975.00/mo

Monthly savings$975.00/mo (50%)

Full Comparison Table

Model	Input/1M	Output/1M	vs GPT-5.6 Sol	Context
GPT-5.6 Sol	$5.00	$30.00	—	1.05M
GPT-5.6 Terra	$2.50	$15.00	50% cheaper input, 50% cheaper output	1.05M
GPT-5.6 Luna	$1.00	$6.00	80% cheaper input, 80% cheaper output	1.05M
Claude Opus 4.8	$5.00	$25.00	Same input, 17% cheaper output	1M
Claude Sonnet 5	$2.00	$10.00	60% cheaper input, 67% cheaper output	1M
Gemini 3.1 Pro	$2.00	$12.00	60% cheaper input, 60% cheaper output	1M
DeepSeek V4 Pro	$0.44	$0.87	91% cheaper input, 97% cheaper output	1M

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