ARCHIVE PRICEDEPRECATED REASONING200KTEXT MODELPROMPT CACHING
o1 API Pricing
o1 is deprecated; this archive preserves the first production OpenAI reasoning price. $15/M input, $60/M output, and $7.5/M cached input. Output includes reasoning tokens, so the $60/M output line matters for old agent invoices.
Archived input - per 1M tokens
$15.00/M
Source OpenAI deprecated
Archived output - per 1M tokens
$60.00/M
Use for invoice checks deprecated
Cached input
$7.50/M
Cache hit price discounted
Effective - agentic blend
$12.94/M
92/8 split - 82% cache
§ 01 / TERMINAL
Run the numbers.
Archive calculator pre-loaded with o1 rates. Tweak spend, output mix, or cache hit rate to compare legacy bills with current replacements.
$ /mo
Workload split
Prompt cache hit rate
Tokens you can process
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Words equivalent (English)
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Effective rate
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§ 02 / SCENARIOS
Real-world presets.
CODING AGENT ARCHIVE
Repo-wide bug fix
$1.14/task
LONG DOC ANALYSIS
Reading 100-page contracts
$2.03/doc
RAG SUPPORT
Support agent ticket triage
$0.095/ticket
ASSISTANT TURN
Research planning turn
$0.226/turn
Estimate · tiktoken-cl100k_base · ≈4 chars/token Auto-counts as you type
This is a chars-per-token approximation, not a real tokenizer. Actual tokens vary by language, code density, and tool-call overhead — counts are typically ±10–20% off for English prose, more for code or non-Latin scripts. For exact billing, use the vendor's official tokenizer.
Characters 281
Words 42
Tokens (estimated) 70 tokens
Cost as input · uncached $0.00105 USD
Cost as output · uncached $0.0042 USD
Cost as cached input $0.00052 USD
| Model | Input /M | Output /M | Effective blended | Context | Best for |
|---|---|---|---|---|---|
| o1 Current | $15.00 cache $7.50 | $60.00 | $12.94 agentic 92/8 | 200K | Legacy reasoning invoices |
| GPT-5.5 | $5.00 cache $0.50 | $30.00 | $3.61 −3.6× | 1M | Current OpenAI flagship |
| GPT-5.4 | $2.50 cache $0.25 | $15.00 | $1.80 −7.2× | 1.05M | Current OpenAI daily driver |
| GPT-5.4 mini | $0.75 cache $0.075 | $4.50 | $0.541 −24× | 400K | Current cheap OpenAI workloads |
| Claude Sonnet 4.6 | $3.00 cache $0.30 | $15.00 | $2.05 −6.3× | 1M | Current Claude agents |
| Gemini 3.8 Flash | $0.75 cache $0.075 | $3.75 | $0.481 −27× · promo | 1M | Gemini long-context work |
| DeepSeek V4 Pro | $1.32 cache $0.044 | $3.96 | $0.569 −23× | 1M | Low-cost reasoning and coding |
By replacement
Frequently asked.
Short answers for teams checking o1 pricing, status, and migration choices.
Q · 01 Is o1 still available? +
o1 is deprecated. OpenAI's deprecations page lists the relevant shutdown and replacement path, so use this page for old workloads and migration checks.
Q · 02 How much did o1 cost? +
o1 is archived at $15/M input and $60/M output.
Q · 03 Is cached-input pricing included? +
Yes. Cached input is shown at $7.5/M.
Q · 04 What replaced it? +
OpenAI's deprecations page names GPT-5.6 Sol as the substitute, with the shutdown on October 23, 2026; use the shelf to compare other current options.
Q · 05 Why keep this archive page? +
Archive pages preserve old price baselines, help explain invoice history, and capture migration search demand without treating old models as current recommendations.