GPT-5.5
OpenAI · Proprietary · Released Apr 24, 2026 · openai/gpt-5.5
1.05M contextVisionToolsReasoningStructured outputPrompt caching
Available from 7 providersUSD / MTOK · VERIFIED 12 HOURS AGO
EST. MONTHLY COSTclick a row for detail · click headers to sort
| PROVIDER | INPUT | OUTPUT | CACHE | CONTEXT | QUANT | TTFT | TPS | UPTIME |
|---|---|---|---|---|---|---|---|---|
 OpenAI1ST PARTY | $2.50 | $15.00 | $0.25 | 1.05M | — | 3.6s | 164 tok/s | 99.3% |
 Azure | $5.00 | $30.00 | $0.50 | 1.05M | — | 5.1s° | 75° tok/s | 100.0% |
| OpenAI1ST PARTY | $5.00 | $30.00 | $0.50 | 1.05M | — | — | — | 99.3% |
| Azure | $5.50 | $33.00 | $0.55 | 1.05M | — | — | — | — |
| Azure | $5.50 | $33.00 | $0.55 | 1.05M | — | — | — | 100.0% |
 Amazon Bedrock | $5.50 | $33.00 | $0.55 | 1.05M | — | ✕ | ✕ | — |
| OpenAI1ST PARTY | $12.50 | $75.00 | $1.25 | 1.05M | — | — | — | 99.3% |
TTFT/TPS: median (P50) over trailing 72h · chat10k profile (~10K in / 200 out) · measured against the provider API directly; ° = routed via OpenRouter (adds a hop) · ✕ = probed, endpoint returned no measurable stream · methodology v1.1 · measured 42 hours ago
Pricing variants · USD / MTok in / out
STANDARD
$2.50 / $15.00
per MTok in / out
BATCH
$1.25 / $7.50
async batch
CACHE READ $0.25WEB SEARCH $0.01 / search
About
GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...
Specifications
Context window1,050,000
Max output128,000
Modalities infile, image, text
Modalities outtext
LicenseProprietary
ReleasedApr 24, 2026
Knowledge cutoff2025-12-01
TokenizerGPT
Related
Embed badge
[](https://modelindex.ai/models/openai/gpt-5.5)Sources
OpenRouter API12 hours ago
AGGREGATORLiteLLM dataset12 hours ago
AGGREGATORModelIndex benchmarks42 hours ago
MEASUREDVerified 12 hours ago · list prices, not negotiated rates.