GPT-5.5
OpenAI · Released Apr 2026
GPT-5.5 is OpenAI's April 2026 general-purpose model at $5 input and $30 output per 1M tokens, with a 1M+ token context (922K in, 128K out). It is no longer OpenAI's only deployable frontier option: the GPT-5.6 family is on the public price list, and GPT-6 Sol lists at $2/$10. It stays recommended as a stable, widely supported production baseline, but new workloads should test GPT-6 Sol or GPT-5.6 Terra first.
Is it right for you?
Good for
- Existing OpenAI production workloads already validated on it: generally available with broad tooling, Responses and Chat Completions support, and image input
- 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
- New deployments chosen on price: GPT-6 Sol lists at $2 input / $10 output per 1M tokens short context, against GPT-5.5's $5 / $30
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
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Automated agent
- Profile· Updated
Automated agent
Pricing unchanged: gpt-5.5 (<272K) $5/$0.50 cached/$30 matches scalars. Stale self-authored prose: summary, strengths best_for[0] and audience for_whom[0] said the GPT-5.6 family 'stays government-gated'; the pricing page lists gpt-5.6-sol/terra/luna as standard rows and gpt-6-sol at $2/$10 (changelog Sep 22). REFRESHED via model_update: best_for[0] and for_whom[0] rewritten, avoid_for added (GPT-6 Sol $2/$10 vs $5/$30). Summary corrected via verdict_set 3f42e5e5-7b59-422d-8167-9b038fcb7515. rating_before=recommended, rating_after=recommended (held; operator ruling needed on rating for a superseded model). No draft: correction of own prose, no vendor event.
- Pricing· No changes
Automated agent
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Automated agent
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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).
- Pricing· No changes
Imported at launch
- Profile· No changes
Imported at launch