GPT-5.2 vs GPT-5.5
GPT-5.2 (2025) and GPT-5.5 (2026) are frontier-tier reasoning models from OpenAI. GPT-5.2 ships a 400k-token context window, while GPT-5.5 ships a 1.05m-token context window. On SWE-bench Verified, GPT-5.5 leads by 2.6 pts. On pricing, GPT-5.2 costs $1.75/1M input tokens; GPT-5.5 ranges from $5 to $8/1M input tokens by tier. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
GPT-5.5 is safer overall; choose GPT-5.2 when coding workflow support matters.
Decision scorecard
Local evidence first| Signal | GPT-5.2 | GPT-5.5 |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | reasoning-heavy apps, multimodal apps, and tool-calling agents |
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 400k | 1.05m |
| Cheapest output | $14/1M tokens | $30/1M tokens |
| Provider routes | 4 tracked | 4 tracked |
| Shared benchmarks | 4 shared | SWE-bench Verified leader |
Decision tradeoffs
- GPT-5.2 has the lower cheapest tracked output price at $14/1M tokens.
- Local decision data tags GPT-5.2 for Coding, RAG, and Agents.
- GPT-5.5 holds a shared-benchmark lead on SWE-bench Verified, ahead by 2.6 points.
- GPT-5.5 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Local decision data tags GPT-5.5 for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
GPT-5.2
$4,900
Cheapest tracked route/tier: Replicate API
GPT-5.5
$11,500
Cheapest tracked route/tier: OpenAI API 0-272K input tokens
Estimated monthly gap: $6,600. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenAI API, OpenRouter, and Vercel AI Gateway; start route-level A/B tests there.
- GPT-5.5 is $16/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Provider overlap exists on OpenRouter, Vercel AI Gateway, and OpenAI API; start route-level A/B tests there.
- GPT-5.2 is $16/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-12-11 | 2026-04-23 |
| Context window | 400k | 1.05m |
| Parameters | — | — |
| Architecture | Decoder Only | Decoder Only |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Weights | Not released | Not released |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | 2025-08 | 2025-12 |
Pricing and availability
| Pricing attribute | GPT-5.2 | GPT-5.5 |
|---|---|---|
| Input price | $1.75/1M tokens |
|
| Output price | $14/1M tokens |
|
| Providers |
Capabilities
| Capability | GPT-5.2 | GPT-5.5 |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | Yes | Yes |
| JSON / Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | Yes | Yes |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | GPT-5.2 | GPT-5.5 |
|---|---|---|
| SWE-bench Verified | 80.0 | 82.6 |
| SWE-bench Pro | 55.6 | 58.6 |
| MMMU Pro | 79.5 | 88.3 |
| GeneBench-Pro | 4.9 | 12.0 |
Continue comparing
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Last reviewed: 2026-10-07. Data sourced from public model cards and provider documentation.