ARCHIVE PRICEDEPRECATED REASONING200KTEXT MODELPROMPT CACHING
o4-mini API Pricing
o4-mini is deprecated; this archive keeps the later mini reasoning price band. $1.1/M input, $4.4/M output, and $0.275/M cached input. It kept the same $1.10/$4.40 headline price as o3-mini while cutting cached input in half.
Archived input - per 1M tokens
$1.10/M
Source OpenAI deprecated
Archived output - per 1M tokens
$4.40/M
Use for invoice checks deprecated
Cached input
$0.275/M
Cache hit price discounted
Effective - agentic blend
$0.742/M
92/8 split - 82% cache
§ 01 / TERMINAL
Run the numbers.
Archive calculator pre-loaded with o4-mini 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
$0.065/task
LONG DOC ANALYSIS
Reading 100-page contracts
$0.109/doc
RAG SUPPORT
Support agent ticket triage
$0.00609/ticket
ASSISTANT TURN
Research planning turn
$0.014/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 288
Words 42
Tokens (estimated) 72 tokens
Cost as input · uncached $0.00008 USD
Cost as output · uncached $0.00032 USD
Cost as cached input $0.00002 USD
| Model | Input /M | Output /M | Effective blended | Context | Best for |
|---|---|---|---|---|---|
| o4-mini Current | $1.10 cache $0.275 | $4.40 | $0.742 agentic 92/8 | 200K | Reasoning archive comparisons |
| GPT-5.5 | $5.00 cache $0.50 | $30.00 | $3.61 +4.9× | 1M | Current OpenAI flagship |
| GPT-5.4 | $2.50 cache $0.25 | $15.00 | $1.80 +2.4× | 1.05M | Current OpenAI daily driver |
| GPT-5.4 mini | $0.75 cache $0.075 | $4.50 | $0.541 −27% | 400K | Current cheap OpenAI workloads |
| Claude Sonnet 4.6 | $3.00 cache $0.30 | $15.00 | $2.05 +2.8× | 1M | Current Claude agents |
| Gemini 3.8 Flash | $0.75 cache $0.075 | $3.75 | $0.481 −35% · 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 o4-mini pricing, status, and migration choices.
Q · 01 Is o4-mini still available? +
o4-mini is deprecated. OpenAI's deprecations page lists the shutdown and replacement path, so use this page for old workloads and migration checks.
Q · 02 How much did o4-mini cost? +
o4-mini is archived at $1.1/M input and $4.4/M output.
Q · 03 Is cached-input pricing included? +
Yes. Cached input is shown at $0.275/M.
Q · 04 What replaced it? +
OpenAI's deprecations page names GPT-5.6 Terra 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.