GPT-5.5
OpenAI · Released Apr 2026
OpenAI's general-purpose commercial frontier model and the deployable OpenAI anchor while the GPT-5.6 family stays government-gated — $5/$30 per 1M tokens with 1M+ context. Strong reasoning, broad ecosystem support, and full public availability make it a solid production default, though cheaper models now match it on specific tasks. For most teams, it remains the baseline newer models are measured against.
Is it right for you?
Good for
- Deployable OpenAI frontier work today — generally available while the GPT-5.6 family stays government-gated
- Complex professional workloads needing strong reasoning and a 1M+ token context window (922K input)
- Teams already on the OpenAI ecosystem — broad tooling, Responses + Chat Completions API support, image input
Not good for
- Pure price-performance on specific tasks — Gemini 3.5 Flash ties it on OSWorld at 1/3 the cost; GPT-5.6 Terra claims GPT-5.5-class perf at half price
- Very-long-context sessions — prompts over 272K input tokens are billed at 2x input / 1.5x output for the whole session
How it performs by task
Complex reasoning
Strong professional-workload reasoning; the OpenAI baseline newer models benchmark against
Agentic coding
Solid and generally available; GPT-5.6 Terra/Sol and Fable 5 lead on top-end coding benchmarks
Long-context work
1M+ context (922K input) handles large corpora; watch the >272K-token surcharge
Computer use
78.7% OSWorld-Verified — tied by Gemini 3.5 Flash at one-third the cost
Pricing
Input
$5 / 1M tokens
Output
$30 / 1M tokens
Context
1M+ tokens (922K in / 128K out)
Verdict history
Sources
Verification log
- Pricing— No changes
Automated agent
- Pricing— No changes
Automated agent
- Pricing— Updated
Automated agent
Created new registry entry GPT-5.5 (general commercial model, distinct from existing gpt-5-5-cyber): $5/$30 per 1M, 1M+ context (922K in / 128K out), released 2026-04-23, verdict recommended (deployable OpenAI frontier anchor while GPT-5.6 family stays gated).
- Profile— No changes
Imported at launch
- Pricing— No changes
Imported at launch