GPT-Rosalind
Last verified September 15, 2026 · OpenAI pricing ↗$5.00/1M input · $25.00/1M output · 1.1M context · OpenAI
GPT-Rosalind is listed at $5.00 per 1M input tokens and $25.00 per 1M output tokens from OpenAI, with a 1.1M-token context window. A typical chat reply (1,500 tokens in, 400 out) costs $0.018, or $175.00 per 10,000 requests. On that workload it is cheaper than 16 of the 168 other buyable models tracked here.
Limited access
Not generally available
GPT-Rosalind is not on OpenAI’s open price list. Access is gated to vetted partners or a waitlist, so the rate below is what those customers pay rather than something you can sign up for. It is excluded from the calculator’s default model list and from every ranking.
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What GPT-Rosalind Costs Per Request
At $5.00 per 1M input and $25.00 per 1M output tokens, before caching or batch discounts.
| Workload | Input / output tokens | Per request | Per 10,000 requests |
|---|---|---|---|
| Chat reply | 1,500 / 400 | $0.018 | $175.00 |
| RAG answer over retrieved docs | 8,000 / 600 | $0.055 | $550.00 |
| Coding-agent step | 30,000 / 2,000 | $0.200 | $2000.00 |
GPT-Rosalind vs Similarly Priced Models
Nearest buyable models by price, with the RAG answer above (8,000 in / 600 out) priced on each.
| Model | Input /1M | Output /1M | Context | RAG answer |
|---|---|---|---|---|
| GPT-Rosalind OpenAI | $5.00 | $25.00 | 1.1M | $0.055 |
| GPT-5.5 OpenAI | $5.00 | $30.00 | 1.1M | $0.058 |
| Claude Opus 5 Anthropic | $5.00 | $25.00 | 1.0M | $0.055 |
| Gemini 3.1 Flash Lite Image Google | $0.250 | $30.00 | 131K | $0.020 |
Alternatives to GPT-Rosalind
Pricing Details
OpenAIOpenAI's life-sciences model, research preview April 16, 2026, GPT-5.5-based update June 3, 2026, generally available through the trusted-access program per the API changelog on September 8, 2026. Card: $5.00 input, $0.50 cached input, $25.00 output, Standard tier only. OpenAI states 'Billing for gpt-rosalind-research begins on October 5, 2026' and 'Cache-write pricing does not apply to this model'; usage before October 5 is unbilled. No Batch, Flex or Fast row and no long-context row are published. IDENTICAL to Claude Opus 5 on all three published lines ($5.00 / $0.50 / $25.00); Opus 5 additionally charges $6.25 to write a cache. Against its GPT-5.5 base ($5.00 / $0.50 / $30.00) it is 1.0x input and 0.833x output, the only OpenAI specialist priced below its base (GPT-5.6 Cyber is 3.125x Sol). Exactly 1.25x GPT-5.6 Sol's promotional $4.00 / $0.40 / $20.00 on every line. ChatGPT Enterprise credit card: 125 / 12.50 / 625 credits per million tokens (25 credits per dollar) and 20 credits per Chat message against Sol's 10. CONTEXT WINDOW AND MAX OUTPUT ARE NOT PUBLISHED: /api/docs/models/gpt-rosalind-research returned 404 on 2026-09-15 and the models index card links to the pricing page; the 1,050,000 / 128,000 here are the GPT-5.5 base's figures as a placeholder and should not be relied on. ACCESS: Enterprise or Business agreements approved through trusted access, or an OpenAI-managed workspace for qualified organisations without one; API use is 'for approved internal research tools, workflows, and applications' and 'not available for customer-facing products or external commercial applications'. In ChatGPT the help centre files it under 'Legacy models' in the picker. OPENAI-REPORTED BENCHMARKS vs GPT-5.5 (June 3 post): MedChemBench 27.5 vs 25.1 with 7.2% fewer tokens, GeneBench 21.6 vs 20.4 with 31% fewer tokens, LabWorkBench 63.2 vs 55.8 with 5.3% fewer tokens; input/output split of the token savings not published. April post: leading BixBench score among published models, beats GPT-5.4 on 6 of 11 LABBench2 tasks. Model ID: gpt-rosalind-research.
Input / 1M tokens
$5
Output / 1M tokens
$25
Context Window
1.1M
Max Output
128K
Price History
No price change recorded since 2026-09-15, when this site started tracking this model; it launched on 2026-04-16.
Frequently Asked Questions
Common questions about GPT-Rosalind pricing and usage
How much does GPT-Rosalind cost?
GPT-Rosalind costs $5 per 1 million input tokens and $25 per 1 million output tokens. This pricing is set by OpenAI.
What tokenizer does GPT-Rosalind use?
GPT-Rosalind uses the o200k_base tokenizer. This is OpenAI's latest tokenizer, optimized for efficiency with a vocabulary of ~200,000 tokens.
What is GPT-Rosalind's context window?
GPT-Rosalind supports a context window of 1.1M tokens (1,050,000 tokens). The maximum output length is 128K tokens.
How does GPT-Rosalind compare to other models?
On an 8,000-token-in, 600-token-out RAG answer, GPT-Rosalind costs $0.055 per request. The nearest-priced alternatives cost: GPT-5.5 (OpenAI) $0.058, Claude Opus 5 (Anthropic) $0.055, Gemini 3.1 Flash Lite Image (Google) $0.020. The table above lists their full rates and context windows.
How do I count tokens for GPT-Rosalind?
Use the token counter at the top of this page or visit the homepage calculator. Paste your text and it will show the exact token count and cost for GPT-Rosalind using the o200k_base tokenizer.