API Need50% off
Uptime
Total Context
1.05M
Max Output
128K
Input
$2.5/ 1M
Output
$15/ 1M
Cache Read
$0.25/ 1M
Cache Write
$3.125/ 1M
OOpenAI: GPT-5.6 Sol API
openai/gpt-5.6-sol
GPT-5.6 Sol API is the highest-ranked GPT-5.6 tier in the current LLM2014 logic table. Its 1.05M context and file, image, and text inputs suit demanding agent runs where reasoning quality matters more than the lowest token rate. [1]
The GPT-5.6 Sol API tier pairs a #3 logic rank with a 72.99 median and 81.94 best score. It finishes ahead of GPT-5.6 Luna in the same family, but costs more per token; choose it when harder coding or multi-step reasoning justifies that premium. [1][2]
MODALITIES
Price$2.5 / $15 / 1MCONTEXT1.05M
Playground
Test GPT-5.6 Sol API with representative production prompts before using gpt-5.6-sol in a live workflow.
Providers
APINEED lists GPT-5.6 Sol API with file, image, and text input, text output, and a 1.05M context window. APINEED routing and prepaid rates are identified separately. [1]
Discount
GPT-5.6 Sol has the highest official token rates in the GPT-5.6 family. APINEED halves both input and output rates, which matters most for reasoning-heavy jobs that generate long answers. The table compares official GPT-5.6 Sol API pricing with the APINEED prepaid rate.
Official
Provider baselineInput $5/ 1MOutput $30/ 1M
BaselineAPINEED50% off
Prepaid creditsInput $2.5/ 1MOutput $15/ 1M
Availability
APINEED continuously monitors GPT-5.6 Sol API access and keeps requests on healthy capacity.
System statusLast 90 days
GPT-5.6 Sol API Benchmarks
GPT-5.6 Sol sits near the top of the July 2026 logic field, one place behind Kimi K3 and ahead of Claude Opus 5. Its shorter measured completion time than Kimi K3 is useful context when comparing top-ranked options. The complete LLM2014 logic 2026-07 table remains below, with GPT-5.6 Sol API highlighted when a current row exists. [2]
| 1st | GPT-5.5 (xhigh) | 83.80 | 77.46 | 7.57% | 494s | 30,811 | $25.51 | $29.57 |
| 2nd | Kimi-K3 (max) | 82.91 | 74.80 | 9.78% | 1095s | 39,912 | $16.76 | $15.00 |
| 3rd | Claude Opus 4.8 (xhigh) | 82.62 | 66.70 | 19.27% | 791s | 41,833 | $28.86 | $24.64 |
| 4th | GPT-5.6 Sol (xhigh) | 81.94 | 72.99 | 10.92% | 369s | 17,433 | $14.43 | $29.57 |
| 5th | Claude Opus 5 (xhigh) | 78.38 | 71.88 | 8.29% | 426s | 26,392 | $18.21 | $24.64 |
| 6th | Qwen3.7-Max (xhigh) | 74.56 | 66.95 | 10.21% | 374s | 54,207 | $7.81 | $5.14 |
| 7th | GLM-5.2 (max) | 73.68 | 58.27 | 20.91% | 890s | 45,683 | $5.12 | $4.00 |
| 8th | Gemini 3.1 Pro (high) | 73.36 | 58.46 | 20.31% | 214s | 25,905 | $8.58 | $11.83 |
| 9th | GPT-5.6 Luna (xhigh) | 69.49 | 51.97 | 25.21% | 242s | 38,083 | $6.31 | $5.91 |
| 10th | DeepSeek V4 Pro (max) | 68.00 | 49.97 | 26.51% | 1468s | 60,558 | $1.45 | $0.86 |
| 11th | Grok 4.5 (high) | 67.59 | 56.72 | 16.08% | 451s | 43,372 | $7.18 | $5.91 |
| 12th | Muse Spark 1.1 | 66.18 | 57.23 | 13.52% | 542s | 42,416 | $4.98 | $4.19 |
| 13th | Gemini 3.5 Flash (high) | 65.92 | 60.39 | 8.39% | 188s | 36,372 | $9.03 | $8.87 |
| 14th | Doubao-Seed-2.1-pro (high) | 58.69 | 49.35 | 15.91% | 2003s | 85,059 | $10.21 | $4.29 |
| 15th | Qwen3.7-Plus (high) | 58.50 | 44.09 | 24.63% | 1237s | 57,152 | $1.83 | $1.14 |
| 16th | Gemini 3.6 Flash (high) | 56.87 | 41.74 | 26.6% | 206s | 26,329 | $5.45 | $7.39 |
| 17th | Tencent Hy3 (high) | 54.42 | 44.60 | 18.04% | 1035s | 52,037 | $0.83 | $0.57 |
| 18th | Claude Sonnet 5 (xhigh) | 51.37 | 43.14 | 16.02% | 529s | 44,118 | $12.18 | $9.86 |
| 19th | DeepSeek V4 Flash (max) | 50.62 | 36.24 | 28.41% | 611s | 49,593 | $0.40 | $0.29 |
| 20th | MiniMax-M3 | 49.18 | 40.94 | 16.75% | 985s | 56,467 | $1.90 | $1.20 |
| 21st | Claude Opus 5 | 42.08 | 31.73 | 24.6% | 154s | 10,180 | $7.02 | $24.64 |
| 22nd | Claude Opus 4.6 | 36.88 | 25.79 | 30.07% | 65s | 4,387 | $3.03 | $24.64 |
| 23rd | Doubao-Seed-2.0-lite 0428 (high) | 35.32 | 26.77 | 24.21% | 656s | 26,726 | $0.38 | $0.51 |
| 24th | Gemini 3.5 Flash (minimal) | 33.24 | 22.22 | 33.15% | 44s | 6,189 | $1.54 | $8.87 |
| 25th | Ling-3.0-flash | 32.53 | 20.62 | 36.61% | 688s | 86,204 | $0.00 | $0.00 |
| 26th | Gemini 3.5 Flash Lite (high) | 30.23 | 22.82 | 24.51% | 188s | 18,297 | $1.26 | $2.46 |
| 27th | GPT-5.5 Instant | 28.87 | 17.66 | 38.83% | 25s | 1,673 | $1.39 | $29.57 |
| 28th | Gemma 4 31B | 27.91 | 22.04 | 21.03% | 770s | 15,050 | $0.17 | $0.39 |
| 29th | MiMo-V2.5-Pro | 26.91 | 13.00 | 51.69% | 478s | 29,443 | $0.71 | $0.86 |
| 30th | Qwen3.7-Plus | 26.19 | 16.23 | 38.03% | 314s | 8,692 | $0.28 | $1.14 |
| 31st | Step-3.7-Flash | 26.18 | 13.74 | 47.52% | 258s | 44,912 | $1.46 | $1.16 |
| 32nd | Qwen3.5-27B | 24.96 | 17.98 | 27.96% | 451s | 26,391 | $0.51 | $0.69 |
| 33rd | Gemini 3.1 Flash Lite (high) | 23.78 | 14.30 | 39.87% | 82s | 28,351 | $1.17 | $1.48 |
| 34th | Claude Sonnet 5 | 23.64 | 10.86 | 54.06% | 109s | 5,962 | $1.65 | $9.86 |
| 35th | Qwen3.7-Max | 22.45 | 18.53 | 17.46% | 196s | 6,710 | $0.97 | $5.14 |
| 36th | ERNIE 5.1 | 20.49 | 15.49 | 24.4% | 457s | 24,093 | $1.73 | $2.57 |
| 37th | openPangu-2.0-Flash | 19.83 | 10.76 | 45.74% | 571s | 28,199 | $0.18 | $0.23 |
| 38th | LongCat-2.0 | 19.40 | 9.74 | 49.79% | 395s | 14,886 | $0.48 | $1.14 |
| 39th | DeepSeek V4 Flash | 19.39 | 13.37 | 31.05% | 63s | 5,286 | $0.04 | $0.29 |
| 40th | Mistral Medium 3.5 | 18.44 | 13.87 | 24.78% | 194s | 27,854 | $5.77 | $7.39 |
| 41st | Doubao-Seed-2.1-pro | 17.49 | 9.74 | 44.31% | 305s | 6,009 | $0.72 | $4.29 |
| 42nd | GLM-5.2 | 14.80 | 10.43 | 29.53% | 23s | 953 | $0.11 | $4.00 |
| 43rd | Ling-2.6-1T | 13.05 | 8.39 | 35.71% | 229s | 4,770 | $0.31 | $2.29 |
| 44th | iFLYTEK Spark X2 | 12.39 | 6.21 | 49.88% | 458s | 11,285 | $0.09 | $0.29 |
| 45th | Gemini 3.1 Flash Lite | 11.79 | 10.28 | 12.81% | 9s | 773 | $0.03 | $1.48 |
| 46th | Mistral Medium 3.5 | 10.83 | 7.13 | 34.16% | 17s | 2,546 | $0.53 | $7.39 |
| 47th | Ling-2.6-flash | 10.07 | 4.85 | 51.84% | 25s | 4,997 | $0.04 | $0.30 |
Quick Start
Connect GPT-5.6 Sol API without changing the OpenAI-style request shape. Use GPT-5.6 Sol for high-effort agent turns, large repository reviews, and mixed file or image prompts. Its supported reasoning controls let callers tune effort instead of changing the request format.
Get your API key
Create an APINEED key for GPT-5.6 Sol API and keep it in an environment variable.
export API_NEED_API_KEY=sk-apineed-v1-...Make your first request
Use gpt-5.6-sol for GPT-5.6 Sol API with the APINEED API. The request shape is compatible with OpenAI chat completions, so most SDKs only need a base URL change.
TypeScript SDKPythoncURLOpenAI SDK
import OpenAI from "openai";
const client = new OpenAI({
apiKey: process.env.API_NEED_API_KEY,
baseURL: "https://apineed.com/v1"
});
const result = await client.chat.completions.create({
model: "openai/gpt-5.6-sol",
messages: [
{ role: "user", content: "Why is the sky blue?" }
]
});
console.log(result.choices[0].message.content);Enable streaming and fallbacks
Add stream: true when GPT-5.6 Sol API should return server-sent events. APINEED keeps routing, provider health, and fallback handling behind the same endpoint.
curl https://apineed.com/v1/chat/completions \
-H "Authorization: Bearer $API_NEED_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "openai/gpt-5.6-sol",
"stream": true,
"messages": [{ "role": "user", "content": "Hello" }]
}'GPT-5.6 Sol API Endpoint
GPT-5.6 Sol API accepts chat conversations here with streaming or non-streaming text output; the supported controls are listed on this page.
POST
/v1/chat/completions- Authorization
- Bearer $API_NEED_API_KEY
- Content-Type
- application/json
- HTTP-Referer
- optional - your site URL, for rankings
- X-Title
- optional - your site name, for rankings
- Model
- openai/gpt-5.6-sol
Parameters
GPT-5.6 Sol API parameters currently listed for openai/gpt-5.6-sol by the OpenRouter Models API. [1]
| Name | Type | Status | Description |
|---|---|---|---|
include_reasoning | boolean | Supported | Includes reasoning content in the response when available. |
max_completion_tokens | integer | Supported | Limits the combined visible and reasoning output tokens. |
max_tokens | integer | Supported | Limits generated output tokens. |
reasoning | object | Supported | Controls reasoning behavior and token allocation. |
reasoning_effort | enum | Supported | Selects the model reasoning effort. |
response_format | object | Supported | Requests a specific response format. |
seed | integer | Supported | Requests deterministic sampling when supported by the provider. |
structured_outputs | boolean | Supported | Enables schema-constrained structured output. |
tool_choice | string or object | Supported | Controls which tool the model may call. |
tools | array | Supported | Defines tools available to the model. |
GPT-5.6 Sol API Q&A
Model-specific answers for teams comparing GPT-5.6 Sol API on capability, benchmark evidence, integration, and cost.
How does GPT-5.6 Sol API differ from GPT-5.6 Terra and GPT-5.6 Luna?
GPT-5.6 Sol is the premium GPT-5.6 tier in this catalog. It ranks higher than GPT-5.6 Luna in the current logic benchmark and carries higher input and output rates than both GPT-5.6 Terra and GPT-5.6 Luna.
When should I choose GPT-5.6 Sol API over Kimi K3?
Choose GPT-5.6 Sol when you need file input, OpenAI-style reasoning controls, or the faster measured completion time in this benchmark. Kimi K3 ranks one place higher and has a different price profile.
Can GPT-5.6 Sol API inspect files and images?
Yes. The catalog lists file, image, and text input with text output, so one request can combine documents or visuals with written instructions.
Is GPT-5.6 Sol suitable for long agent sessions?
GPT-5.6 Sol API's 1.05M context supports large working sets, but teams should still trim repeated history because both input volume and generated reasoning affect cost.
Which endpoint serves GPT-5.6 Sol API?
Call GPT-5.6 Sol API through https://apineed.com/v1/chat/completions with gpt-5.6-sol as the model value. Existing OpenAI SDK clients usually need only the APINEED base URL and key.
How do I validate GPT-5.6 Sol API before release?
Evaluate GPT-5.6 Sol API on representative prompts, record quality, latency, and token use, then choose reasoning settings and fallbacks from those results.
How to Deploy the GPT-5.6 Sol API on apineed.com
Deploy GPT-5.6 Sol API through APINEED after validating its model-specific trade-offs above. The API key, credit, and endpoint flow stays consistent across the catalog.
Add credits for GPT-5.6 Sol API
Add credits on APINEED before deploying the GPT-5.6 Sol API. Pay-as-you-go billing lets usage start small and scale with production traffic.
Get your API key
Create an APINEED API key for the GPT-5.6 Sol API. The same key can call GPT-5.6 Sol and other AI APIs through apineed.com.
Set the model slug
Use gpt-5.6-sol as the model value when you deploy the GPT-5.6 Sol API. Keep the APINEED base URL at https://apineed.com/v1.
Send a request to GPT-5.6 Sol API
Send chat completions or responses to the GPT-5.6 Sol API from Claude Code, Codex, or any custom agent. The request keeps its OpenAI-compatible shape.