Both models report the same input price at $2 per 1M tokens.
API cost decision in 10 seconds
GPT-5.6 Terra Pro vs OpenAI GPT Latest
Pick OpenAI GPT Latest when budget is the priority.
Page updated:
Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick OpenAI GPT Latest when budget is the priority.
On the standard 1M input plus 500K output workload, OpenAI GPT Latest is estimated at $7 vs $8 for GPT-5.6 Terra Pro, saving $1 (12.5% lower).
Cost-first pickOpenAI GPT Latest
Context-first pickBoth models
Sample savings$112.5%
10x traffic gap$10
The reported context window is tied, so cost and provider fit carry more weight. At 10x that traffic, the same price gap is about $10. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
OpenAI GPT Latest stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | GPT-5.6 Terra Pro | OpenAI GPT Latest |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | OpenAI GPT Latest | $16 | $15 |
| Balanced workload | 1M input + 1M output | OpenAI GPT Latest | $14 | $12 |
| Output-heavy chatbot | 1M input + 5M output | OpenAI GPT Latest | $62 | $52 |
OpenAI GPT Latest is $2 cheaper per 1M output tokens (16.7% lower; 1.2x difference).
Both models report the same context window at 1.05M tokens.
OpenAI GPT Latest is $1 cheaper on the standard workload (12.5% lower).
Estimate your workload cost
Your Workload Cost
This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.
Quick Decision
both models tie on input price; OpenAI GPT Latest has the lower output price; both models report the same context window. For the 1M input plus 500K output sample, OpenAI GPT Latest is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $8 for GPT-5.6 Terra Pro and $7 for OpenAI GPT Latest.
Choose GPT-5.6 Terra Pro when its provider, model quality, latency, or availability is more important than the numeric price/context winner.
Choose OpenAI GPT Latest when you care most about lower output-token price.
- On the standard 1M input plus 500K output workload, OpenAI GPT Latest is estimated at $7 vs $8 for GPT-5.6 Terra Pro, saving $1 (12.5% lower).
- OpenAI GPT Latest is $1 cheaper on the standard workload (12.5% lower).
- Both models report the same input price at $2 per 1M tokens.
- OpenAI GPT Latest is $2 cheaper per 1M output tokens (16.7% lower; 1.2x difference).
- Both models report the same context window at 1.05M tokens.
| Feature | GPT-5.6 Terra Pro (OpenAI) | OpenAI GPT Latest (OpenAI) |
|---|---|---|
| Input Price prompt tokens per 1M | $2 | $2 |
| Completion Price per 1M tokens | $12 | $10 |
| Sample Workload Cost 1M input + 500K output | $8 | $7 |
| Context Window | 1.05M | 1.05M |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | OpenAI GPT Latest | On the standard 1M input plus 500K output workload, OpenAI GPT Latest is estimated at $7 vs $8 for GPT-5.6 Terra Pro, saving $1 (12.5% lower). |
| High-volume input processing | Tie | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | OpenAI GPT Latest | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | Tie | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- gpt-oss-120b (free) can replace GPT-5.6 Terra Pro when lower sample workload cost matters most: $0.
- gpt-oss-20b (free) can replace GPT-5.6 Terra Pro when lower sample workload cost matters most: $0.
- gpt-oss-20b can replace GPT-5.6 Terra Pro when lower sample workload cost matters most: $0.1.
- gpt-oss-120b can replace GPT-5.6 Terra Pro when lower sample workload cost matters most: $0.12.
- Grok 4.20 Multi-Agent offers 2M context with $2.5 sample workload cost.
- Grok 4.20 offers 2M context with $2.5 sample workload cost.
- DeepSeek V4 Flash 0731 offers 1.31M context with $0.17 sample workload cost.
- DeepSeek V4 Flash Latest offers 1.31M context with $0.11 sample workload cost.
- DeepSeek V4 Flash 0731 · DeepSeek · #1
- MiMo-V2.5 · Xiaomi · #2
- Hy3 · Tencent · #3
- Ox Alpha · stealth · #4
Cheaper alternatives
Review low-cost models sorted by a standard 1M input plus 500K output workload.
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Open provider hubsOpenAI catalog
Review all tracked OpenAI models before deciding whether this matchup is the right shortlist.
Open OpenAI modelsGPT-5.6 Terra Pro is the same underlying model as [GPT-5.6 Terra](https://openrouter.ai/openai/gpt-5.6-terra), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#reasoning-mode
This model always redirects to the latest model in the OpenAI GPT family.