As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/m/gpt-rosalind/

# GPT-Rosalind

OpenAI. Status: current. Type: reasoning model. Released: 2026-04-17. Training cutoff: not published.

## How to call it

| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| OpenAI API (trusted access only) | `gpt-rosalind-research` | https://api.openai.com/v1/chat/completions | https://help.openai.com/en/articles/20001193-introducing-gpt-rosalind-for-life-sciences-research |
| OpenAI API (listed on the pricing page since Oct 2026; not announced, access terms unknown) | `gpt-rosalind-discovery` |  | https://developers.openai.com/api/docs/pricing |
| ChatGPT / Codex (eligible organisations) |  |  | https://openai.com/gpt-rosalind/ |

## Pricing

- Input: $5 per 1M tokens
- Cached input: $0.50 per 1M tokens
- Output: $25 per 1M tokens
- Unit as published: per 1M tokens (USD); billed from 2026-10-05
- Source: https://developers.openai.com/api/docs/pricing
- Last checked: 2026-10-13

## Specs

- Input: text
- Output: text
- Context window: not published
- Max output: not published
- Open weights: no
- Licence: proprietary

## What it has not seen

- No published training cutoff. Counted from its release (2026-04-17): at least 1,874 AI events since (429 major, 84 historic), as of 2026-11-13.
- Everything since March 2026: https://postcutoff.com/since/2026-03/

## What stands out

- Life-sciences specialist reasoning: Tuned for genomics, protein and sequence analysis, medicinal chemistry, literature synthesis, wet-lab troubleshooting and experiment planning; OpenAI reports BixBench pass@1 0.751 at launch and LabWorkBench 63.2% (vs GPT-5.5 55.8%) after the June update. Source: https://openai.com/index/introducing-new-capabilities-to-gpt-rosalind/
- Trusted-access dual-use deployment: Callable only by vetted organisations with an approved research deployment; a Rosalind Biodefense programme extends access to US government and allied public-health partners. Source: https://www.rdworldonline.com/openai-launches-rosalind-biodefense-offers-federal-agencies-early-access-to-its-life-sciences-model/

## Notes

Research preview 17 Apr 2026; rebuilt on GPT-5.5 on 3 June 2026 (OpenAI says 31% fewer tokens than GPT-5.5); out of preview globally 11 Sept 2026. Context window and max output not published. Pricing per OpenAI's pricing page 'Life Sciences' section, as quoted by TokenCost and the Portkey model registry (PR #953); not read directly on openai.com (403). Verified 2026-10-05 on developers.openai.com/api/docs/pricing ('Life Sciences' row: $5.00 / $0.50 cached / $25.00; 'Billing for gpt-rosalind-research begins on October 5, 2026. Cache-write pricing does not apply'; access limited to approved internal research through the trusted-access program). Free Codex Life Sciences plugin connects any model to 50+ scientific tools.

Access requires OpenAI trusted-access approval; ordinary API keys will be refused.

Sources:
- https://openai.com/index/introducing-gpt-rosalind/
- https://github.com/Portkey-AI/models/pull/953

Model page: https://postcutoff.com/m/gpt-rosalind/