text model comparison
GPT-5.5 vs GPT-Rosalind-6
GPT-5.5 and GPT-Rosalind-6 are both current text models, from OpenAI. GPT-5.5 is 67% cheaper per 1M input tokens than GPT-Rosalind-6, $5 vs $15.
- Lower price per 1M input tokens
- GPT-5.5$5 against $15
- Newer release
- GPT-Rosalind-6Oct 2026 against Apr 2026
Data verified November 5, 2026 · Dataset 2026-11-05
Side by side
GPT-5.5 and GPT-Rosalind-6, line by line
Prices in effect today, compared at the same tier wherever both list one. The better value in each row is highlighted.
| Fact | GPT-5.5 | GPT-Rosalind-6 |
|---|---|---|
| Price | ||
| Price per 1M input tokens | $5 (better) | $15 |
| Price per 1M output tokens | $30 (better) | $75 |
| Independent benchmarks | ||
| Arena Text | 1482 Elo (#14 of 52) | Not measured |
| GPQA Diamond | 90.7% (#24 of 41) | Not measured |
| FrontierMath Tiers 1-3 (v2) | 85.3% (#13 of 41) | Not measured |
| SimpleQA Verified | 63% (#12 of 38) | Not measured |
| LiveBench Overall | 79.91 points (#1 of 4) | Not measured |
| Specs | ||
| Provider | OpenAI | OpenAI |
| Release date | April 23, 2026 | October 30, 2026 |
| Access | API only | limited access |
| Context window | 1,050,000 tokens | Not reported |
| Max output | 128,000 tokens | Not reported |
| Input | text, image | text |
| Output | text | text |
No independent benchmark has scored both models yet. Each rank counts the current models scored on that benchmark.
Scores:Arena · 2026-11-03Epoch AI · 2026-11-03LiveBench · 2026-06-25
Charts
Against every current text model
Where GPT-5.5 and GPT-Rosalind-6 land among the current models of their task, on every independent benchmark, on price and on context.
Where each stands
Only GPT-5.5 has a current Arena Text score: #14 of 52. Each bar is the share of current models it beats.
Independent benchmarks
Arena Text
GPT-5.5:#14of 52
1,482 Elo · ahead of 71%
GPT-Rosalind-6: Not scored
GPQA Diamond
GPT-5.5:#24of 41
90.7% · ahead of 43%
GPT-Rosalind-6: Not scored
FrontierMath Tiers 1-3 (v2)
GPT-5.5:#13of 41
85.3% · ahead of 70%
GPT-Rosalind-6: Not scored
SimpleQA Verified
GPT-5.5:#12of 38
63% · ahead of 70%
GPT-Rosalind-6: Not scored
LiveBench Overall
GPT-5.5:#1of 4
79.9 · ahead of 100%
GPT-Rosalind-6: Not scored
Price and context
Price per 1M input tokens
GPT-5.5:#48of 55
$5 · cheaper than 9%
GPT-Rosalind-6:#55of 55
$15 · cheaper than 0%
Price per 1M output tokens
GPT-5.5:#50of 55
$30 · cheaper than 9%
GPT-Rosalind-6:#55of 55
$75 · cheaper than 0%
Context window
GPT-5.5:#1of 64
1.05M tokens · longer than 86%
GPT-Rosalind-6: Not listed
Quality against price
GPT-5.5 scores 1,482 at $11.25 (blended price per 1M tokens). The line joins the current models no other beats on both price and Arena Text score; hover any point to name it.
Quality against price: the data
| Model | Provider | Blended price per 1M tokens | Arena Text (Elo) |
|---|---|---|---|
| Gemini 4 Carbon | $4 | 1,528 | |
| Gemini 4 Argon | $4 | 1,520 | |
| Claude Opus 5.5 | Anthropic | $8 | 1,509 |
| Muse Wonder | Meta | $8 | 1,507 |
| Claude Fable 5 | Anthropic | $20 | 1,504 |
| Claude Fable 5.1 | Anthropic | $20 | 1,504 |
| Gemini 3.8 Flash | $1.50 | 1,496 | |
| Muse Spark 1.3 | Meta | $2 | 1,495 |
| Claude Opus 5 | Anthropic | $10 | 1,492 |
| Kimi K3 | Moonshot Kimi | $6 | 1,488 |
| GPT-5.6 Sol | OpenAI | $8 | 1,485 |
| Gemini 3.6 Flash | $3 | 1,483 | |
| GPT-5.5 | OpenAI | $11 | 1,482 |
| Claude Opus 4.8 | Anthropic | $10 | 1,482 |
| Qwen3.8-Max | Alibaba Qwen | $3 | 1,482 |
| GPT-6.1 Sol | OpenAI | $4 | 1,481 |
| GLM-5.3 | Z.ai | $2.15 | 1,481 |
| MiMo-V2.6-Pro | Xiaomi MiMo | $0.54 | 1,480 |
| Claude Sonnet 5.5 | Anthropic | $4 | 1,477 |
| GLM-5.3-Flash | Z.ai | $0.24 | 1,477 |
| GPT-6 Astra | OpenAI | $20 | 1,476 |
| DeepSeek-V4.1-Flash | DeepSeek | $0.52 | 1,476 |
| GPT-5.4 | OpenAI | $5.63 | 1,475 |
| Gemini 3 Flash Preview | $1.13 | 1,473 | |
| Grok 4.20 | xAI | $1.56 | 1,472 |
| GPT-5.6 Terra | OpenAI | $4.50 | 1,467 |
| Grok 4.5 | xAI | $3 | 1,465 |
| DeepSeek-V4-Pro | DeepSeek | $1.98 | 1,465 |
| Claude Sonnet 5 | Anthropic | $4 | 1,462 |
| GPT-6 Sol | OpenAI | $4 | 1,458 |
| Gemini 3.5 Flash-Lite | $0.85 | 1,456 | |
| Grok 4.6 | xAI | $3 | 1,455 |
| GPT-5.6 Luna | OpenAI | $0.45 | 1,453 |
| MiMo-V2.6-Flash | Xiaomi MiMo | $0.18 | 1,448 |
| Step 5 Preview | StepFun | $1.43 | 1,448 |
| Grok 4.3 | xAI | $1.56 | 1,442 |
| GPT-6 Luna | OpenAI | $0.20 | 1,441 |
| Grok 4.7 | xAI | $3 | 1,441 |
| Mistral Large 4 | Mistral AI | $1.05 | 1,432 |
| Claude Haiku 5.5 | Anthropic | $0.20 | 1,425 |
| GPT-4.1 | OpenAI | $3.50 | 1,415 |
| Solar Pro 4 | Upstage | $0.52 | 1,388 |
| GPT-4.1 mini | OpenAI | $0.70 | 1,383 |
| GPT-4.1 nano | OpenAI | $0.18 | 1,322 |
Cost
What each costs
Example workloads at each provider's listed rates, then every other rate either one lists. The cheaper figure in each row is highlighted.
The same work, priced
For 10M input and 2M output tokens, GPT-Rosalind-6 costs 2.7 times as much as GPT-5.5, at each provider's listed rates.
10M input and 2M output tokens
GPT-Rosalind-6 costs 2.7× as much
- GPT-5.5
- $110
- GPT-Rosalind-6
- $300
The same, with 9M of the input tokens cached
GPT-Rosalind-6 costs 2.6× as much
- GPT-5.5
- $69.50
- GPT-Rosalind-6
- $178.50
| Workload or rate | GPT-5.5 | GPT-Rosalind-6 |
|---|---|---|
| Example workloads | ||
| 10M input and 2M output tokens | $110 (better) | $300 |
| The same, with 9M of the input tokens cached | $69.50 (better) | $178.50 |
| Other listed rates | ||
| 1M input tokens, cached | $0.50 (better) | $1.50 |
Your own bill will differ. These figures use list prices and example workloads. The AI Model Cost Audit reviews your real usage, shortlists models that score as well for each task for less, and estimates the savings.
Launch price $100, regular price $150
Verdict
When to choose each
GPT-5.5
Where it leads
- Lower input and output prices, $5 and $30 vs $15 and $75 per 1M tokens
- Accepts image input
- Cheaper cached input, $0.50 vs $1.50 per 1M tokens
Best for
- High-capability API evaluations with long context
Watch out for
- Prompts above the provider long-context threshold use higher token rates; validate the selected reasoning effort against production cost
GPT-Rosalind-6
Where it leads
No measured lead over GPT-5.5 in this data.
Best for
- Drug discovery and life sciences research teams approved for OpenAI's trusted access
- Dual-use biology research that GPT-6 Astra is more likely to refuse
Watch out for
- Limited access: OpenAI offers it only through its trusted-access program, after reviewing each applicant's intended use, security controls and governance, for internal research
- OpenAI treats it as High capability in the biological and chemical domain, so access comes with security, monitoring and enforcement terms
- OpenAI publishes no context window for it and compares it only with GPT-Rosalind-5.5; no independent benchmark score is recorded here yet
From benchmark to production
Building on GPT-5.5 or GPT-Rosalind-6?
Public scores rarely hold on your own data. We test both models on your real tasks, then build the agent or pipeline around the one that wins.
AI Model Cost AuditLaunch price $100, regular price $150What the audit includes
FAQ
GPT-5.5 vs GPT-Rosalind-6 FAQ
Which is cheaper, GPT-5.5 or GPT-Rosalind-6?
GPT-5.5 is 67% cheaper per 1M input tokens than GPT-Rosalind-6, $5 vs $15. For 10M input and 2M output tokens, GPT-5.5 costs $110 and GPT-Rosalind-6 $300 at standard rates.
Which is cheaper with prompt caching, GPT-5.5 or GPT-Rosalind-6?
GPT-5.5 charges $0.50 per 1M cached input tokens, 90% below its standard input rate, and GPT-Rosalind-6 $1.50, 90% below. With 9M of 10M input tokens cached and 2M output tokens, GPT-5.5 costs $69.50 and GPT-Rosalind-6 $178.50.
How do GPT-5.5 and GPT-Rosalind-6 differ in features?
GPT-5.5 takes text and image input; GPT-Rosalind-6 takes text.
Further reading
More on GPT-5.5 and GPT-Rosalind-6
Articles on GPT-5.5 and GPT-Rosalind-6
Related comparisons
- Claude Opus 4.8 vs GPT-5.5
- Claude Fable 5.1 vs GPT-Rosalind-6
- Gemini 3.5 Flash vs GPT-5.5
- Claude Fable 5 vs GPT-Rosalind-6
- Claude Haiku 5.5 vs GPT-5.5
- Claude Mythos 5.1 vs GPT-Rosalind-6
- Claude Opus 5.5 vs GPT-5.5
- GPT-6 Astra vs GPT-Rosalind-6
- GPT-5.5 vs GPT-6 Astra
- Gemini 3.8 Flash vs GPT-5.5
- Claude Opus 5 vs GPT-5.5
- GPT-5.5 vs Kimi K3
Production evaluation
Choosing between GPT-5.5 and GPT-Rosalind-6?
Public benchmarks narrow the shortlist. We run both on your own tasks, data and cost limits, then build the routing and review controls to run the winner in production.
- A head-to-head evaluation on your real workload
- Routing between models by cost and difficulty