OpenAI adds return_token_budget parameter to Responses API web search tool
OpenAI added a new `return_token_budget` parameter to the Responses API web search tool, enabling longer reasoning-augmented web search runs for GPT-5 and later models. The feature is opt-in and targets high-effort research and evaluation workloads. This extends the controllability of inference-time compute for web-grounded tasks.
Related guides (4)
Related events (8)
OpenAI releases GPT-5.5 and GPT-5.5 Pro to the API with 1M token context and built-in agentic tools
OpenAI released GPT-5.5 and GPT-5.5 Pro to the Chat Completions and Responses API, positioning them as frontier models for complex professional work and compute-intensive tasks respectively. GPT-5.5 supports a 1M token context window, image input, structured outputs, function calling, built-in computer use, hosted shell, MCP, web search, and Skills. Notable behavioral changes include reasoning effort defaulting to medium and extended-only prompt caching support.
New Tools and Features in the Responses API
OpenAI announced new tools and features for its Responses API, expanding the capabilities available to developers building on the platform. The update likely includes additional built-in tools, improved function calling, or new modalities accessible through the API. As a Tier 1 source announcement, this represents a meaningful expansion of OpenAI's developer-facing infrastructure. Specific details were not available in the body text provided.
OpenAI adds image results to web search in the Responses API
OpenAI's Responses API web search tool now returns image results alongside text results. The feature targets use cases requiring web-grounded visuals such as product photos, landmarks, events, and visual references. This expands the multimodal utility of the Responses API for developers building search-augmented applications.
GPT-5.4 released with tool search, computer use, and frontier benchmark performance
OpenAI released GPT-5.4 in Thinking and Pro variants, featuring an expanded context window (up to 1.05M input tokens), native computer use, tool search capabilities, and adjustable reasoning levels. In independent testing by Artificial Analysis, GPT-5.4 Pro at xhigh reasoning achieved state-of-the-art on GDP-Val-AA, BrowseComp, Terminal-Bench-Hard, SWE-Bench-Pro, and MCP Atlas, while trailing Gemini 3.1 Pro Preview on MMMU-Pro and Humanity's Last Exam. Pricing is set at the top of the market ($30/$180 per million input/output tokens for Pro), and the release also powers Codex, OpenAI's competitor to Claude Code. The item is reported via The Batch (tier 2 commentary) and includes additional context on Andrew Ng's chub CLI tool for agent documentation sharing.
OpenAI Releases gpt-oss-120b and gpt-oss-20b Open-Weight Reasoning Models
OpenAI has published model cards for gpt-oss-120b and gpt-oss-20b, two open-weight reasoning models released under the Apache 2.0 license alongside a dedicated gpt-oss usage policy. This marks a significant move by OpenAI into the open-weights space, offering both a large 120B parameter model and a smaller 20B variant. The release signals a strategic shift for OpenAI, which has historically kept its frontier models proprietary.
OpenAI releases GPT-5.4 and GPT-5.4 pro to the API with computer use, 1M context, and tool search
OpenAI released GPT-5.4 and GPT-5.4 pro to the Chat Completions and Responses API, positioning them as frontier models for professional and compute-intensive work. The release bundles several infrastructure capabilities: tool search for deferred runtime tool loading to reduce token usage and improve latency, built-in computer use via screenshot-based UI interaction, a 1M token context window, and native Compaction support for long-running agent workflows. These additions collectively advance OpenAI's agentic API surface significantly. Note: as of the current canonical facts, GPT-5.5 is the current OpenAI flagship, making this a prior-generation release.
OpenAI adds Admin API capabilities for spend alerts, model allowlists, and billing
OpenAI released new Admin API features enabling enterprise administrators to manage spend alerts, model allowlists, data retention settings, and hosted tool permissions. The update also adds querying of granular billing line items. These additions expand programmatic control for organizations deploying OpenAI at scale.
OpenAI releases GPT-5.3 Instant with improved tone, relevance, and web search
OpenAI shipped GPT-5.3 Instant, an incremental update to the GPT-5.3 line focused on conversational quality improvements: more accurate answers, better-contextualized web search results, and reduced unnecessary caveats and declarative phrasing. The update is default-off for ChatGPT Enterprise and Edu workspaces, requiring admin opt-in via Early Model Access settings. OpenAI explicitly frames this as addressing user-experience dimensions that don't surface in standard benchmarks.