diff --git a/src/_locales/en/main.json b/src/_locales/en/main.json
index c59db9795..8ad74e6ef 100644
--- a/src/_locales/en/main.json
+++ b/src/_locales/en/main.json
@@ -229,6 +229,7 @@
   "OpenAI (GPT-6 Astra)": "OpenAI (GPT-6 Astra)",
   "OpenAI (GPT-6 Sol)": "OpenAI (GPT-6 Sol)",
   "OpenAI (GPT-6 Luna)": "OpenAI (GPT-6 Luna)",
+  "OpenAI (GPT-6.1 Sol)": "OpenAI (GPT-6.1 Sol)",
   "Anthropic (Claude Sonnet 4.6)": "Anthropic (Claude Sonnet 4.6)",
   "Anthropic (Claude Sonnet 5.5)": "Anthropic (Claude Sonnet 5.5)",
   "This provider is still used by other API modes or saved conversations": "This provider is still used by other API modes or saved conversations",
diff --git a/src/config/index.mjs b/src/config/index.mjs
index b3f983fef..81c956e46 100644
--- a/src/config/index.mjs
+++ b/src/config/index.mjs
@@ -82,6 +82,7 @@ export const chatgptApiModelKeys = [
   'chatgptApi6Astra',
   'chatgptApi6Sol',
   'chatgptApi6Luna',
+  'chatgptApi6_1Sol',
   'chatgptApi4oMini',
   'chatgptApi4_1',
   'chatgptApi4_1_mini',
@@ -340,6 +341,7 @@ export const Models = {
   chatgptApi6Astra: { value: 'gpt-6-astra', desc: 'OpenAI (GPT-6 Astra)' },
   chatgptApi6Sol: { value: 'gpt-6-sol', desc: 'OpenAI (GPT-6 Sol)' },
   chatgptApi6Luna: { value: 'gpt-6-luna', desc: 'OpenAI (GPT-6 Luna)' },
+  chatgptApi6_1Sol: { value: 'gpt-6.1-sol', desc: 'OpenAI (GPT-6.1 Sol)' },
 
   chatgptApi4_1: { value: 'gpt-4.1', desc: 'OpenAI (GPT-4.1)' },
   chatgptApi4_1_mini: { value: 'gpt-4.1-mini', desc: 'OpenAI (GPT-4.1 mini)' },
@@ -774,7 +776,7 @@ export const defaultApiModeIds = [
   'ollamaModel',
   'customModel',
   'azureOpenAi',
-  'chatgptApi6Sol',
+  'chatgptApi6_1Sol',
   'chatgptApi5_6Terra',
   'chatgptApi6Luna',
   'chatgptApi6Astra',
diff --git a/src/services/apis/openai-token-params.mjs b/src/services/apis/openai-token-params.mjs
index 3ad85cf7c..47ff64a7f 100644
--- a/src/services/apis/openai-token-params.mjs
+++ b/src/services/apis/openai-token-params.mjs
@@ -1,5 +1,5 @@
 const OPENAI_MAX_COMPLETION_TOKENS_MODEL_PATTERN =
-  /^(?:gpt-5(?:[.-]|$)|gpt-6-(?:astra|sol|luna)(?:-|$)|chat-latest$)/
+  /^(?:gpt-5(?:[.-]|$)|gpt-6(?:\.1-sol|-(?:astra|sol|luna))(?:-|$)|chat-latest$)/
 
 function shouldUseMaxCompletionTokens(provider, model) {
   const normalizedProvider = String(provider || '').toLowerCase()
diff --git a/src/services/apis/temperature-params.mjs b/src/services/apis/temperature-params.mjs
index dce99e9f9..d4d6b91c7 100644
--- a/src/services/apis/temperature-params.mjs
+++ b/src/services/apis/temperature-params.mjs
@@ -10,6 +10,7 @@ const MODELS_WITHOUT_CUSTOM_TEMPERATURE = new Set([
   'gpt-6-astra',
   'gpt-6-sol',
   'gpt-6-luna',
+  'gpt-6-1-sol',
 ])
 
 function normalizeModelId(model) {
diff --git a/tests/unit/config/config-predicates.test.mjs b/tests/unit/config/config-predicates.test.mjs
index 9a07e3997..581008703 100644
--- a/tests/unit/config/config-predicates.test.mjs
+++ b/tests/unit/config/config-predicates.test.mjs
@@ -55,6 +55,7 @@ const representativeChatgptApiModelNames = [
   'chatgptApi5_6Luna',
   'chatgptApi6Sol',
   'chatgptApi6Luna',
+  'chatgptApi6_1Sol',
 ]
 const representativeGptCompletionApiModelNames = ['gptApiInstruct']
 const representativeClaudeApiModelNames = ['claudeOpus48Api', 'claudeSonnet46Api']
@@ -85,9 +86,10 @@ afterEach(() => {
   restoreNavigator()
 })
 
-test('GPT-6 Sol and Luna replace their GPT-5.6 counterparts in the default presets', () => {
-  assert.equal(defaultApiModeIds.includes('chatgptApi6Sol'), true)
+test('GPT-6 defaults use GPT-6.1 Sol and GPT-6 Luna', () => {
+  assert.equal(defaultApiModeIds.includes('chatgptApi6_1Sol'), true)
   assert.equal(defaultApiModeIds.includes('chatgptApi6Luna'), true)
+  assert.equal(defaultApiModeIds.includes('chatgptApi6Sol'), false)
   assert.equal(defaultApiModeIds.includes('chatgptApi5_6Sol'), false)
   assert.equal(defaultApiModeIds.includes('chatgptApi5_6Luna'), false)
 })
diff --git a/tests/unit/services/apis/openai-api-compat.test.mjs b/tests/unit/services/apis/openai-api-compat.test.mjs
index 8adc7ae87..4e355d3e0 100644
--- a/tests/unit/services/apis/openai-api-compat.test.mjs
+++ b/tests/unit/services/apis/openai-api-compat.test.mjs
@@ -791,6 +791,7 @@ test('generateAnswersWithOpenAiApi uses max_completion_tokens for GPT-6 and omit
   for (const [modelName, model] of [
     ['chatgptApi6Sol', 'gpt-6-sol'],
     ['chatgptApi6Luna', 'gpt-6-luna'],
+    ['chatgptApi6_1Sol', 'gpt-6.1-sol'],
   ]) {
     const newSession = {
       modelName,
diff --git a/tests/unit/services/apis/openai-token-params.test.mjs b/tests/unit/services/apis/openai-token-params.test.mjs
index b775e06fb..95902e363 100644
--- a/tests/unit/services/apis/openai-token-params.test.mjs
+++ b/tests/unit/services/apis/openai-token-params.test.mjs
@@ -96,6 +96,9 @@ test('uses completion token limits only for supported OpenAI GPT-6 models', () =
     'GPT-6-ASTRA',
     'gpt-6-sol',
     'gpt-6-luna',
+    'gpt-6.1-sol',
+    'gpt-6.1-sol-20260929',
+    'GPT-6.1-SOL',
   ]) {
     assert.deepEqual(getChatCompletionsTokenParams('openai', model, 1024), {
       max_completion_tokens: 1024,
@@ -107,9 +110,13 @@ test('uses completion token limits only for supported OpenAI GPT-6 models', () =
   for (const model of [
     'gpt-6-astral',
     'gpt-6-solar',
+    'gpt-6.1-solar',
+    'gpt-6.10-sol',
     'my-gpt-6-astra',
+    'my-gpt-6.1-sol',
     'gpt-60',
     'openai/gpt-6-astra',
+    'openai/gpt-6.1-sol',
   ]) {
     assert.deepEqual(getChatCompletionsTokenParams('openai', model, 1024), {
       max_tokens: 1024,
diff --git a/tests/unit/services/apis/temperature-params.test.mjs b/tests/unit/services/apis/temperature-params.test.mjs
index 148a4780a..c0eab35fc 100644
--- a/tests/unit/services/apis/temperature-params.test.mjs
+++ b/tests/unit/services/apis/temperature-params.test.mjs
@@ -115,6 +115,10 @@ test('temperature overrides omit GPT-6 models across provider ID formats', () =>
     'openai/gpt-6-sol',
     'gpt-6-luna',
     'openai/gpt-6-luna',
+    'gpt-6.1-sol',
+    'openai/gpt-6.1-sol',
+    'GPT-6.1-SOL',
+    'gpt-6.1-sol-20260929',
   ]) {
     assert.equal(canApplyTemperatureOverride(model), false, model)
     assert.deepEqual(
@@ -123,7 +127,15 @@ test('temperature overrides omit GPT-6 models across provider ID formats', () =>
       model,
     )
   }
-  for (const model of ['gpt-6-astral', 'gpt-6-solar', 'my-gpt-6-astra', 'gpt-4.1']) {
+  for (const model of [
+    'gpt-6-astral',
+    'gpt-6-solar',
+    'gpt-6.1-solar',
+    'gpt-6.10-sol',
+    'my-gpt-6-astra',
+    'my-gpt-6.1-sol',
+    'gpt-4.1',
+  ]) {
     assert.equal(canApplyTemperatureOverride(model), true, model)
   }
 })
diff --git a/tests/unit/utils/model-name-convert.test.mjs b/tests/unit/utils/model-name-convert.test.mjs
index 3feb26aa4..0c8d228b1 100644
--- a/tests/unit/utils/model-name-convert.test.mjs
+++ b/tests/unit/utils/model-name-convert.test.mjs
@@ -792,6 +792,7 @@ test('modelNameToDesc returns desc for stable GPT API presets', () => {
   assert.equal(modelNameToDesc('chatgptApi5_6Luna'), 'OpenAI (GPT-5.6 Luna)')
   assert.equal(modelNameToDesc('chatgptApi6Sol'), 'OpenAI (GPT-6 Sol)')
   assert.equal(modelNameToDesc('chatgptApi6Luna'), 'OpenAI (GPT-6 Luna)')
+  assert.equal(modelNameToDesc('chatgptApi6_1Sol'), 'OpenAI (GPT-6.1 Sol)')
 })
 
 test('modelNameToDesc appends extraCustomModelName for customModel', () => {