GPT-5.5 Pro

OpenAIKey gpt-5.5-proAlso reported as openai/gpt-5.5-pro

Rank
#594
by active users
Active users
1
No change from 1 active users in the previous 30 days. vs previous 30 days
Adoption
0.1%
of 967 accounts
Tokens
7.9M
cache included
Est. cost
$27
at public list prices
First seen
Apr 29, 2026
in any submission

Oct 15 – Nov 13, 2026 (UTC)967 accounts100% of tokens from an identified modelData through Nov 13, 2026, 06:05 UTCHow we count

Daily active users

Distinct accounts that used this model on each UTC day.

0 active users on Nov 13, 2026

Daily active users for GPT-5.5 Pro, Oct 15, 2026 to Nov 13, 2026. Peak 1. Use the left and right arrow keys to read each day.110
Show daily values
Daily active users and tokens for GPT-5.5 Pro
Date (UTC)Active usersTokens
Oct 15, 202617.9M
Oct 16, 202600
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Token mix

How the 7.9M tokens split. Cache reads are usually most of an agent's tokens and are priced far below input.

  • Input62%
  • Output0.4%
  • Cache read37%
  • Cache write0%
  • Reasoning0%

Agents that carry GPT-5.5 Pro

Each agent's share of this model's tokens, and how many accounts used the model through it.

  1. Hermes Agent100% of this model's tokens1active users

Benchmarks

The best result for GPT-5.5 Pro in each benchmark Tokscale tracks. Each benchmark has its own unit, run conditions and source, so compare a score only with other models on the same benchmark. Rank is among the models Tokscale matched in that benchmark.

All benchmarks
  • Epoch Capabilities IndexOverall · Epoch AI
    162.7
    Rank #14 of 158 matched modelsNo conditions reportedModel released Apr 23, 2026Source: epoch.ai (opens in a new tab)
  • GPQA DiamondReasoning · Epoch AI
    93.9%
    Rank #16 of 160 matched modelsXHighRun date Apr 24, 2026Source: epoch.ai (opens in a new tab)

    Near its ceiling: the top score is 96.5%, and Epoch AI estimates the reachable maximum at 97%. Differences between top models are small.

  • FrontierMath Tiers 1–3 (v2)Reasoning · Epoch AI
    87.7%
    Rank #11 of 90 matched modelsXHighRun date Jun 12, 2026Source: epoch.ai (opens in a new tab)

    Near its ceiling: the top score is 95.1%, and Epoch AI estimates the reachable maximum at 95%. Differences between top models are small.

Not evaluated: Humanity's Last Exam, SimpleQA Verified, Terminal-Bench 4.1, CursorBench, DeepSWE, FrontierSWE, Agent Arena, WebDev Arena. A missing result is not a score of zero.

Pricing

List prices from models.dev in US dollars per 1M tokens, retrieved Nov 12, 2026. OpenAI is the lab's own API and the reference price for the estimates below.

Price at real agent usageEstimate at list prices

What 1M tokens cost at the reference list price when they split into input, output and cache the way Tokscale users' agents used them. It is not what anyone paid.

At this model's mix
$30.67
Est. per 1M tokens
37% cache reads
At the community mix
$30.52
Est. per 1M tokens
96% cache reads
3:1 input/output blend
$67.50
Per 1M tokens at list prices
No cache

Cache reads were 37% of GPT-5.5 Pro tokens in the last 30 days and 96% of all tokens. The 3:1 blend, (3 × input + output) ÷ 4, is the usual comparison and ignores cache.

Assumptions

  • OpenAI list prices per 1M tokens: input $30, output $180.
  • This model's mix is its own input, output, cache and reasoning tokens in the last 30 days.
  • The community mix is the tokens of every identified model in the last 30 days.
  • This is an estimate at list prices, not what anyone paid.
  • Reasoning tokens are priced as output.
  • Long-context tiers, batch pricing and discounts are not applied.
  • Token mixes come from public Tokscale submissions. Hidden accounts are excluded.
  • No cache-read price is listed, so cache reads are priced as input.
  • No cache-write price is listed, so cache writes are priced as input.

List prices by provider

  • OpenAIReferencegpt-5.5-pro
    $30 input per 1M tokens$180 output per 1M tokensCache read not listedCache write not listed1.05M tokens of context
  • OpenRouteropenai/gpt-5.5-pro
    $30 input per 1M tokens$180 output per 1M tokensCache read not listedCache write not listed1.05M tokens of context
  • Vercel AI Gatewayopenai/gpt-5.5-pro
    $30 input per 1M tokens$180 output per 1M tokensCache read not listedCache write not listed1M tokens of context

Specs

From models.dev (MIT), retrieved Nov 12, 2026, as the lab or the first listed provider reports them. A dash means models.dev does not list the value.

Context window
1.05M tokens
Max output
128K tokens
Input
Text, Image, PDF
Output
Text
Knowledge cutoff
Dec 1, 2025
Release date
Apr 23, 2026
Open weights
No
Reasoning
Yes
Tool calling
Yes

Top public profiles

Public profiles that used GPT-5.5 Pro most in this period, by tokens. Hidden accounts are never listed.

  1. 1PROTIK MONDAL@MNDL-277.9Mtokens$27est. cost1active days$27 est. cost · 1 active days

More from OpenAI

Other OpenAI models in the same period, by active users.

  1. GPT-6.1 Sol70% adoption675active users
  2. GPT-6 Astra59% adoption575active users
  3. GPT-6 Luna45% adoption439active users
  4. Codex Auto Review30% adoption291active users
  5. GPT-6.1 Terra29% adoption285active users
  6. GPT-6 Sol25% adoption244active users
All models

Sources and attribution

Each score keeps its own source, unit and run conditions. Tokscale does not combine benchmarks into one score, and a missing score means the model was not evaluated, not that it scored zero.

  • Epoch AIEpoch Capabilities Index, Epoch's own runs and the external results it collects.CC BY 4.0 · Retrieved Nov 12, 2026 · Data through Nov 9, 2026Epoch AI, ‘Capabilities & benchmarking’. Published online at epoch.ai. Retrieved from https://epoch.ai/benchmarks.
  • models.devSpecs and list prices per provider.MIT · Retrieved Nov 12, 2026models.dev, an open catalog of AI models (github.com/anomalyco/models.dev).
  • TokscaleActive users, tokens and token mix from public Tokscale submissions. Hidden accounts are excluded.How we count