GPT-5.6 Terra pricing, context window, and cost calculator
An OpenAI model with separate tracked short-context and long-context pricing profiles.
Verified fields
Quick facts
gpt-5.6-terraSupported capabilities
- Streaming
- Function calling
- Structured outputs
- Prompt caching
- Batch API
- Reasoning
Only capabilities explicitly tracked from provider documentation are shown.
Source-tracked rates
Verified pricing profiles
Amounts are USD per 1M tokens unless the column states an hourly storage unit.
| Profile | Input / 1M | Cached input / 1M | Cache write / 1M | Output / 1M | Notes |
|---|---|---|---|---|---|
| standard / short contextDefault | $2.00 USD | $0.20 USD | $2.50 USD | $12.00 USD | Used for default estimates. |
| standard / long context | $4.00 USD | $0.40 USD | $5.00 USD | $18.00 USD | Tracked separately; select explicitly when modeling this profile. |
Official price history
GPT-5.6 Terra price changes
Verified changes for the same model and pricing profile. Cross-model generational price differences are not treated as history.
OpenAI · Standard · Short Context
GPT-5.6 Terra
| Rate | Earlier price | Later recorded price | Change | Percentage |
|---|---|---|---|---|
| Input / 1M | $2.50 | $2.00 | -$0.50 | -20.0% |
| Cached input / 1M | $0.25 | $0.20 | -$0.05 | -20.0% |
| Output / 1M | $15.00 | $12.00 | -$3.00 | -20.0% |
| Cache write / 1M | $3.13 | $2.50 | -$0.625 | -20.0% |
StackLens first observed the lower price on the current official OpenAI pricing source; the provider's original effective date was not independently established.
OpenAI · Standard · Long Context
GPT-5.6 Terra
| Rate | Earlier price | Later recorded price | Change | Percentage |
|---|---|---|---|---|
| Input / 1M | $5.00 | $4.00 | -$1.00 | -20.0% |
| Cached input / 1M | $0.50 | $0.40 | -$0.10 | -20.0% |
| Output / 1M | $22.50 | $18.00 | -$4.50 | -20.0% |
| Cache write / 1M | $6.25 | $5.00 | -$1.25 | -20.0% |
StackLens first observed the lower price on the current official OpenAI pricing source; the provider's original effective date was not independently established.
Workload estimate
GPT-5.6 Terra cost calculator
Change the workload assumptions. The calculator uses the same shared pricing resolver as StackLens Compare.
Estimated monthly total$80.00
- Monthly input cost
- $20.00
- Monthly output cost
- $60.00
- Per 1,000 requests
- $8.00
- Active profile
- standard / short context
Estimate excludes untracked provider-specific charges.
Explicit assumptions
Common workload examples
1M input tokens
$2.00 under the standard.short_context profile, excluding output and other charges.
1M output tokens
$12.00 under the standard.short_context profile, excluding input and other charges.
10,000 monthly requests
At 1,000 input and 500 output tokens per request: $80.00 under standard / short context.
50% cached input
The same default workload with 50% cached input is estimated at $71.00. Cache savings apply only to the tracked cached-input rate.
Research layer
Experience and rollout notes
Official facts are separated from user reports. Community reports are useful signals, not controlled benchmarks.
Official model specification
OpenAI publishes Terra as a distinct GPT-5.6 API model with its own pricing and specification record. StackLens cost estimates use those provider-published fields rather than inferred family pricing.
What this does not prove: Official availability and pricing do not establish reliability for a particular coding workflow.
Clarity and autonomous coding
Early reports are split: some users find Terra clearer and more practical than earlier models, while others report serious mistakes during autonomous repository changes.
What this does not prove: The reports are anecdotal and use different repositories and permission settings. Require review checkpoints before allowing destructive changes.
No controlled StackLens benchmark yet
StackLens has not run a controlled GPT-5.6 Terra benchmark. The notes above separate official documentation from independent user reports.
Research reviewed 2026-07-13. Reports may change as GPT-5.6 Terra reaches more workflows.
Tracked relationships
Related models
StackLens relationship map based on model families and published decision comparisons. Find a workload match → Open relationship map → Open price map →
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Continue your research
Verification
Sources and methodology
Pricing and limits are source-tracked and may change. Verify current values with the provider before making production purchasing decisions.
Calculator profile rule: standard.short_context is the verified default. Requests with more than 272,000 input tokens use the higher long-context rate for the full request.