Deprecated — shuts down Oct 23, 2026.
Still purchasable until then, but the provider has
announced end-of-life. Don't start new work on it. Full deprecation status & replacements →
Availability: Migration target: gpt-5.6-sol.
Today's price · per 1M tokens
Input
$1.10
per 1M tokens
Output
$4.40
per 1M tokens
Blended
$1.93
blended $/1M — 3:1 weighted input:output
Cached input
$0.550
50% of input — prompt caching
Source: official OpenAI pricing · read Jun 25, 2026
MODELPRICEWATCH.COM · 2026-08-09
Overview
Reasoning model with extended thinking. Still available for cost-conscious reasoning workloads.
Capabilities
struck through = not supportedInput 1/5
Text ✓
Image
Audio
Video
PDF
Output 1/5
Text ✓
Image
Audio
Video
Embedding
Features 3/9
Prompt caching ✓
Reasoning ✓
Coding
Fast inference
Long context ✓
Open weights
Multimodal
Web search
Realtime
Benchmark performance
accuracy % · higher is betterAvg benchmark score65.9%
Perf per $/Mtok34.2
GPQA Diamond
79.7%
SWE-Bench Verified vendor
60%
LiveCodeBench
74.1%
Humanity's Last Exam
14%
ARC-AGI 2 vendor
35%
AIME 2025
86.5%
MMMLU
81.1%
BFCL
65.12%
HumanEval
61%
MATH 500 vendor
88%
Independent composite scores
- AA Intelligence Index: 15.7 (Artificial Analysis composite across reasoning, knowledge and coding evals)
- AA Agentic Index: 1.7 (Tool use, planning, autonomy)
- AA-Omniscience Index: -42.6 (−100–100)
- LMSYS Chatbot Arena: 1430.8 ELO (Human preference)
How it stacks up
- Ranks #35 of 67 benchmarked models by average score
- Ranks #94 of 151 comparably-measured models by percentile score, across 11 independent measurements
- Ranks #113 of 151 comparably-tested models by normalized performance per dollar
- Strongest at AIME 2025 — 86.5%, #16 of 36
214 tokens/sec output 14s latency to first token (TTFT)
Source: Vellum LLM Leaderboard · updated Aug 9, 2026 · See full rankings →
Specifications
- Provider
- OpenAI
- Context window
- 200K tokens
- Modality
- text
- Parameters
- Proprietary
- Open source
- No — proprietary
- Released
- Jan 31, 2025
- Status
- Deprecated ends Oct 23, 2026
- Last updated
- Jun 25, 2026
- Tags
Availability verified: Jul 25, 2026 — per OpenAI's own deprecation notice