GPT-4o
$812.50 / month- Input cost
- $712.50
- Output cost
- $100.00
- Per 1,000 calls
- $406.25
- Pricing profile
- standard
Source-tracked model comparison
gpt-5.6-terra vs GPT-4o: which costs less for a practical API workload?
Compare verified pricing and model limits for routing within the GPT-5.6 family. The cost example uses a long-context research workload and does not assume equal model quality.
Direct cost answer: GPT-4o is estimated at $812.50 per month and gpt-5.6-terra at $832.50 for 150,000 input tokens, 5,000 output tokens, and 2,000 monthly requests. GPT-4o is $20.00 lower under these assumptions. This does not identify a quality winner.
Tracked facts
Pricing and model limits
Prices are USD per 1M tokens under each model's verified default profile.
| Field | GPT-4o | gpt-5.6-terra |
|---|---|---|
| Provider | OpenAI | OpenAI |
| API model ID | gpt-4o | gpt-5.6-terra |
| Input / 1M | $2.50 | $2.50 |
| Cached input / 1M | $1.25 | $0.25 |
| Output / 1M | $10.00 | $15.00 |
| Context window | 128,000 tokens | 1,050,000 tokens |
| Maximum output | 16,384 tokens | 128,000 tokens |
| Accepted input | text, image | text, image |
Example workload
Long-context research cost scenario
150,000 input and 5,000 output tokens per request, 2,000 monthly requests, and 10% cached input.
gpt-5.6-terra
$832.50 / month- Input cost
- $682.50
- Output cost
- $150.00
- Per 1,000 calls
- $416.25
- Pricing profile
- standard / short context
Cost result: GPT-4o is $20.00 lower per month for these assumptions. This is a price comparison, not a model-quality ranking.
Questions to answer before choosing
- Which model meets the required quality threshold on representative inputs?
- How do output length, retries, and caching change the measured cost?
- Which provider and deployment path fit the team's operational requirements?
What this estimate leaves out
Models whose tracked context window is below the scenario input are excluded from the compatible-model table.
Latency, reliability, output quality, retries, regional processing, and provider-specific tool charges can change the practical decision.
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