{"slug":"gpt-5.5","id":"gpt-5.5","type":"model","title":"GPT-5.5","description":"OpenAI's flagship model (codename Spud). Strong agentic coding, computer use, and frontier math. 1.05M context, 128K max output. $5/$30 per 1M tokens.","last_updated":"2026-06-10","last_verified":"2026-06-10","verification_status":"verified","markdown_url":"/content/models/gpt-5.5.md","html_url":"/models/gpt-5.5","api_url":"/api/v1/models/gpt-5.5.json","content_hash":"c3b49f99ad6a640bf818789885dd2fa56c6ffc3f0c6b5664cbc1d038462322fb","sha256":"c3b49f99ad6a640bf818789885dd2fa56c6ffc3f0c6b5664cbc1d038462322fb","provider":"OpenAI","model_type":"proprietary","api_model_id":"gpt-5.5","knowledge_cutoff":"2025-12","capabilities":["function_calling","vision","web_search","file_search","code_execution","computer_use","structured_output","streaming","prompt_caching","mcp","long_context","reasoning"],"availability_status":"available","deprecated":false,"tool_schema_format":"openai","pricing_confidence":"high","model_listing_confidence":"high","benchmark_confidence":"low","sources":[{"title":"Introducing GPT-5.5","url":"https://openai.com/index/introducing-gpt-5-5/"},{"title":"OpenAI GPT-5.5 model documentation","url":"https://developers.openai.com/api/docs/models/gpt-5.5"},{"title":"OpenAI API pricing","url":"https://developers.openai.com/api/docs/pricing"}],"benchmark_sources":[{"title":"Introducing GPT-5.5 evaluations","url":"https://openai.com/index/introducing-gpt-5-5/"},{"title":"AI Future Ready benchmark methodology","url":"https://ai-future-ready.com/guides/benchmark-methodology"}],"pricing":{"input":"$5.00 / 1M tokens","output":"$30.00 / 1M tokens","input_per_1m":5,"output_per_1m":30,"currency":"USD","cache_read_per_1m":0.5,"long_context_input_per_1m":10,"long_context_output_per_1m":45,"note":"Long-context requests are billed at $10/$45. GPT-5.5 Pro is $30/$180. GPT-5.5 Instant serves ChatGPT as chat-latest at $5/$30."},"benchmarks":{"reasoning":97,"coding":95,"math":97,"writing":94,"multilingual":91,"speed":72},"context_window":"1.05M tokens","modality":["text","image"],"license":"Proprietary","tags":["openai","proprietary","text","image"],"website":"https://openai.com","release_date":"2026-04-23","relationships":{"links":[],"related":[{"id":"gpt-5.4","title":"GPT-5.4","type":"model","html_url":"/models/gpt-5.4","markdown_url":"/content/models/gpt-5.4.md","shared_tags":["openai","proprietary","text","image"],"score":8},{"id":"gpt-5.4-thinking","title":"GPT-5.4 Thinking","type":"model","html_url":"/models/gpt-5.4-thinking","markdown_url":"/content/models/gpt-5.4-thinking.md","shared_tags":["openai","proprietary","text","image"],"score":8},{"id":"gpt-oss-120b","title":"GPT-OSS-120B","type":"model","html_url":"/models/gpt-oss-120b","markdown_url":"/content/models/gpt-oss-120b.md","shared_tags":["openai","text"],"score":6},{"id":"claude-fable-5","title":"Claude Fable 5","type":"model","html_url":"/models/claude-fable-5","markdown_url":"/content/models/claude-fable-5.md","shared_tags":["proprietary","text","image"],"score":5},{"id":"claude-haiku-4.5","title":"Claude Haiku 4.5","type":"model","html_url":"/models/claude-haiku-4.5","markdown_url":"/content/models/claude-haiku-4.5.md","shared_tags":["proprietary","text","image"],"score":5},{"id":"claude-opus-4.6","title":"Claude Opus 4.6","type":"model","html_url":"/models/claude-opus-4.6","markdown_url":"/content/models/claude-opus-4.6.md","shared_tags":["proprietary","text","image"],"score":5}],"explicit":{}},"metadata":{"title":"GPT-5.5","type":"model","id":"gpt-5.5","provider":"OpenAI","model_type":"proprietary","api_model_id":"gpt-5.5","release_date":"2026-04-23","description":"OpenAI's flagship model (codename Spud). Strong agentic coding, computer use, and frontier math. 1.05M context, 128K max output. $5/$30 per 1M tokens.","last_updated":"2026-06-10","last_verified":"2026-06-10","knowledge_cutoff":"2025-12","availability_status":"available","deprecated":false,"tool_schema_format":"openai","pricing_confidence":"high","model_listing_confidence":"high","benchmark_confidence":"low","context_window":"1.05M tokens","website":"https://openai.com","license":"Proprietary","modality":["text","image"],"tags":["openai","proprietary","text","image"],"pricing":{"input":"$5.00 / 1M tokens","output":"$30.00 / 1M tokens","input_per_1m":5,"output_per_1m":30,"currency":"USD","cache_read_per_1m":0.5,"long_context_input_per_1m":10,"long_context_output_per_1m":45,"note":"Long-context requests are billed at $10/$45. GPT-5.5 Pro is $30/$180. GPT-5.5 Instant serves ChatGPT as chat-latest at $5/$30."},"benchmarks":{"reasoning":97,"coding":95,"math":97,"writing":94,"multilingual":91,"speed":72},"capabilities":["function_calling","vision","web_search","file_search","code_execution","computer_use","structured_output","streaming","prompt_caching","mcp","long_context","reasoning"],"sources":[{"title":"Introducing GPT-5.5","url":"https://openai.com/index/introducing-gpt-5-5/"},{"title":"OpenAI GPT-5.5 model documentation","url":"https://developers.openai.com/api/docs/models/gpt-5.5"},{"title":"OpenAI API pricing","url":"https://developers.openai.com/api/docs/pricing"}],"benchmark_sources":[{"title":"Introducing GPT-5.5 evaluations","url":"https://openai.com/index/introducing-gpt-5-5/"},{"title":"AI Future Ready benchmark methodology","url":"https://ai-future-ready.com/guides/benchmark-methodology"}],"best_for":["Agentic coding and computer use","Frontier math and research","Knowledge work across tools","OpenAI ecosystem integrations"]},"content_text":"# GPT-5.5\n\nOpenAI's flagship since April 23, 2026. GPT-5.5 (codename \"Spud\") pushes hardest on agentic work: operating software, moving across tools, researching online, and finishing multi-step tasks. OpenAI reports 82.7% on Terminal-Bench 2.0 and the strongest FrontierMath results published to date (51.7% on Tiers 1-3, 35.4% on Tier 4), and the model line extends to GPT-5.5 Pro ($30/$180) for maximum reasoning and GPT-5.5 Instant, which replaced GPT-5.3 Instant as the ChatGPT default with 52.5% fewer hallucinated claims on high-stakes prompts.\n\nPricing moved up with capability: $5/$30 versus GPT-5.4's $2.50/$15, with long-context requests billed at $10/$45. The 1.05M context window and 128K max output match the Claude frontier on paper, and the toolchain -- web search, file search, code interpreter, computer use, MCP -- is the broadest of any provider.\n\nWhere it sits in the current field: on coding-specific evals it trails Anthropic's frontier (58.6% SWE-bench Pro versus 69.2% for Opus 4.8 and 80.3% for Fable 5), while on math and tool-driven knowledge work it is at or near the top. The ecosystem argument from GPT-5.4 still applies in full.\n\n**When to pick something else:** For pure software engineering depth, Opus 4.8 wins at a lower output price ($25 vs $30). If you're cost-sensitive and GPT-5.4 handled your workload, the 2x price jump may not pay for itself -- GPT-5.4 remains available. For math-heavy batch work where latency doesn't matter, GPT-5.5 Pro exists, but at $180 per million output tokens it needs to earn it.","content_length":3601,"generated_at":"2026-06-22"}