OpenAI
GPT-5.6 Luna
gpt-5.6-lunaStandard · over 272K inputGlobal
- Input
- $0.4
- Cache read
- $0.04
- Output
- $1.80
- Context
- 1.05M
OPENAI API PRICING
OpenAI GPT token cost calculator.
Compare current GPT API input, cached-input, output, context-tier, and regional rate cards without mixing API billing with ChatGPT plan quotas.
- Models
- 3
- Rate cards
- 6
- Input range
- $0.2–$10
- Output range
- $1.20–$45
- Cache-priced cards
- 6
- Verified
- 2026-08-16
CACHE AMORTIZATION
Price writes and reads as an episode.
Model a stable reusable prefix, each cache creation, and the reads that actually land inside its lifetime. The counterfactual weights every billing category at its published rate.
CACHE EPISODE ECONOMICS
GPT-5.6 Sol$5 ordinary input · $6.25 cache write · $0.5 cache read / 1M5m TTL · output tokens excluded because they are identical in both arms
Without caching$60.00
With caching$28.13
Estimated reduction: $31.88 (53.1%)
BREAK-EVEN1 cache read per write
600 modeled requests across 100 cache episodes.
This is an input-cost counterfactual, not realized savings. It assumes the prefix stays byte-stable and every planned read hits within the selected TTL. Verify provider usage fields and accepted-answer quality.
OpenAI API pricing ↗OPENAI WORKLOAD
Model the calls you actually make.
Enter monthly workload, tokens, and quality pass rates. The calculator resolves eligible price bands, then shows cost per accepted answer and the candidate break-even pass rate.
Estimated monthly API spend · OpenAI
GPT-5.6 SolBefore · Standard · up to 272K input: $5 input · $0.5 cache read · $30 output / 1MAfter · Standard · up to 272K input: $5 input · $0.5 cache read · $30 output / 1MGlobal · price bands selected automatically from input size
Before$300.00
After$202.13
Potential saving: $97.88 (32.6%)
QUALITY-ADJUSTED COST
Before / accepted answer$0.033390% pass assumption
After / accepted answer$0.023885% pass assumption
Candidate break-even: 60.6% pass rate. Your scenario assumes 85%.
Warm cache-read scenario, not general ROI. It excludes cache writes/storage, tools, regional uplifts, retries, and quality failures. A dash means no published cache-read rate.
OpenAI API pricing ↗Long-context thresholds and cache rates are model-specific. TokenGauge selects the matching published tier from the input size instead of averaging short- and long-context prices.
DATED RATE CARDS
OpenAI prices with their scope intact.
Rates are USD per one million tokens. Future and transitional cards remain labeled with their effective dates instead of silently replacing today’s tier.
| Provider / model | Price scope | Input USD / 1M | Cache read USD / 1M | Output USD / 1M | Context | Source |
|---|---|---|---|---|---|---|
OpenAIGPT-5.6 Lunagpt-5.6-luna | Standard · over 272K inputGlobal | $0.4 | $0.04 | $1.80 | 1.05M | Official ↗ |
OpenAIGPT-5.6 Lunagpt-5.6-luna | Standard · up to 272K inputGlobal | $0.2 | $0.02 | $1.20 | 1.05M | Official ↗ |
OpenAIGPT-5.6 Solgpt-5.6-sol | Standard · over 272K inputGlobal | $10 | $1 | $45 | 1.05M | Official ↗ |
OpenAIGPT-5.6 Solgpt-5.6-sol | Standard · up to 272K inputGlobal | $5 | $0.5 | $30 | 1.05M | Official ↗ |
OpenAIGPT-5.6 Terragpt-5.6-terra | Standard · over 272K inputGlobal | $4 | $0.4 | $18 | 1.05M | Official ↗ |
OpenAIGPT-5.6 Terragpt-5.6-terra | Standard · up to 272K inputGlobal | $2 | $0.2 | $12 | 1.05M | Official ↗ |
Rates in USD per 1M tokens
OpenAI
GPT-5.6 Luna
gpt-5.6-lunaStandard · up to 272K inputGlobal
- Input
- $0.2
- Cache read
- $0.02
- Output
- $1.20
- Context
- 1.05M
OpenAI
GPT-5.6 Sol
gpt-5.6-solStandard · over 272K inputGlobal
- Input
- $10
- Cache read
- $1
- Output
- $45
- Context
- 1.05M
OpenAI
GPT-5.6 Sol
gpt-5.6-solStandard · up to 272K inputGlobal
- Input
- $5
- Cache read
- $0.5
- Output
- $30
- Context
- 1.05M
OpenAI
GPT-5.6 Terra
gpt-5.6-terraStandard · over 272K inputGlobal
- Input
- $4
- Cache read
- $0.4
- Output
- $18
- Context
- 1.05M
OpenAI
GPT-5.6 Terra
gpt-5.6-terraStandard · up to 272K inputGlobal
- Input
- $2
- Cache read
- $0.2
- Output
- $12
- Context
- 1.05M
USD per 1M tokens. Snapshot verified 2026-08-16. Cache writes, cache storage, tools, regions, and provider-specific thresholds may be billed separately.
A missing cache rate is shown as “—”, never treated as free. Consumer chat-plan quotas are not API prices.
What to verify before shipping
Long-context thresholds and cache rates are model-specific. TokenGauge selects the matching published tier from the input size instead of averaging short- and long-context prices.
Price accepted answers, not token deltas
Count retries, fallbacks, tool calls, latency failures, and answers rejected by the quality rubric. A lower estimated token bill is useful only when the workload still succeeds.
Open the controlled A/B labBefore you trust the estimate.
How current are the OpenAI API prices?
This page uses TokenGauge’s 2026-08-16 official-source snapshot. Follow the linked provider pages before making a production commitment because prices can change.
Does this calculator include every OpenAI charge?
No. The workload calculator models input, output, and a warm cache-read share. The separate cache-episode calculator includes published cache writes and reads, but storage, tools, retries, regional uplifts, taxes, batch modes, and quality failures can still change the invoice.
Are consumer chat subscriptions included?
No. ChatGPT, Claude, Gemini, Grok, Kimi, and other consumer-plan quotas are separate from provider API token billing.